US4920964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwavable thermal compress and method and use thereof
Assignee: Jack Frost Labs Inc
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Filing: 1988-05-31
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Granted: 1990-05-01
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Expires: 2008-05-31
Abstract
Abstract A microwavable thermal pack and a method of heating the pack. The thermal pack is a completely sealed envelope constructed from opposed laminate layers, portions of which are joined by sealed seams. The layers define an inner chamber within which is disposed a heat transfer material. Each of the laminate layers includes a pair of co-extensive inner and outer films contacting each other throughout their surface areas. The films are selected so that the laminate layers of the thermal pack do not pass the heat transfer material during heating of the heat transfer material within the thermal pack which is equivalent to the energy developed by a microwave device operating at full power for a period of time greater than about one minute but less than about four minutes.
Inventors
- 👤 Sam E. Francis, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:27
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F2007/0242; F; F25; F25D; F25D2303/00; F25D2303/08; F25D2303/082; F25D2303/0822
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
173 words
A process of microwave heating a thermal pack comprising the steps of: providing a thermal pack comprising a completely sealed envelope constructed from opposed laminate layers, said layers defining an inner chamber within which is disposed a heat transfer material, said chamber being sealed from the exterior of said thermal pack, each of said laminate layers including a pair of co-extensive inner and outer films contacting each other throughout their surface ares, said films being of dissimilar materials; applying microwave energy to said pack for heating said heat transfer material to a desired temperature; and selecting the dissimilar materials so that the laminate layers of said thermal pack do not pass said heat transfer material during heating of said thermal pack and do not rupture or separate at the seams thereof when subjected to said microwave energy which is equivalent to the energy developed by a microwave heating device operating at full power of about 750 watts for a period of time greater than about one minute but less than about four minutes.
Claim 2
Dependent Claim
173 words
A process of microwave heating a thermal pack comprising the steps of: providing a thermal pack comprising a completely sealed envelope constructed from opposed laminate layers, said layers defining an inner chamber within which is disposed a heat transfer material, said chamber being sealed from the exterior of said thermal pack, each of said laminate layers including a pair of co-extensive inner and outer films contacting each other throughout their surface ares, said films being of dissimilar materials; applying microwave energy to said pack for heating said heat transfer material to a desired temperature; and selecting the dissimilar materials so that the laminate layers of said thermal pack do not pass said heat transfer material during heating of said thermal pack and do not rupture or separate at the seams thereof when subjected to said microwave energy which is equivalent to the energy developed by a microwave heating device operating at full power of about 750 watts for a period of time greater than about one minute but less than about four minutes.
Claim 3
Dependent Claim
15 words
A process as set forth in claim 1, wherein said dissimilar materials are synthetic resins.
Claim 4
Dependent Claim
14 words
A process as set forth in claim 1, wherein said inner film is polyethylene.
Claim 5
Dependent Claim
26 words
A process as recited in claim 2, wherein said dissimilar materials are synthetic resins and the outer film is nylon and the inner film is Nylon-Sclair.
Claim 6
Dependent Claim
14 words
A process as set forth in claim 1 wherein said outer film is nylon.
Claim 7
Dependent Claim
28 words
A process as set forth in claim 5, wherein the outer film has a thickness of one mil and the inner film has a thickness of two mils.
Claim 8
Dependent Claim
30 words
A process as set forth in claim 1 wherein said gel includes water and said films are impervious to the passage of steam produced during heating of said gel pack.
Claim 9
Dependent Claim
100 words
A process of treating a surface of a body comprising the steps of: (a) utilizing an instant chemical thermal pack including unreactive chemicals; (b) causing said chemicals to react to produce a cold or heated pack; (c) placing said cold or heated pack in contact with said body to transfer heat thereto; (d) removing said pack from said body when the temperature of the pack is substantially at ambient; (e) immediately reheating said pack by microwave energy for a period of time of about 2.0 minutes, and thereafter again placing said heated pack in heat transfer relationship with said body.
Claim 10
Dependent Claim
100 words
A process of treating a surface of a body comprising the steps of: (a) utilizing an instant chemical thermal pack including unreactive chemicals; (b) causing said chemicals to react to produce a cold or heated pack; (c) placing said cold or heated pack in contact with said body to transfer heat thereto; (d) removing said pack from said body when the temperature of the pack is substantially at ambient; (e) immediately reheating said pack by microwave energy for a period of time of about 2.0 minutes, and thereafter again placing said heated pack in heat transfer relationship with said body.
Claim 11
Dependent Claim
158 words
A microwave thermal pack comprising: a completely sealed envelope construed from opposed laminate layers portions of which are joined by sealed seams, said layers defining an inner chamber within which is disposed a heat transfer material, said chamber being sealed from the exterior of said thermal pack, each of said laminate layers including a pair of co-extensive inner and outer films contacting each other throughout their surface areas, said films being of dissimilar materials; and said dissimilar materials being selected so that the laminate layers of said thermal pack do not pass said heat transfer material during heating of the heat transfer material within said thermal pack and do not rupture or separate at the seams thereof when subjected to microwave energy which is equivalent to the energy developed by a microwave heating device operating at full power of about 750 watts for a period of time greater than about one minute but less than about four minutes.
Claim 12
Dependent Claim
158 words
A microwave thermal pack comprising: a completely sealed envelope construed from opposed laminate layers portions of which are joined by sealed seams, said layers defining an inner chamber within which is disposed a heat transfer material, said chamber being sealed from the exterior of said thermal pack, each of said laminate layers including a pair of co-extensive inner and outer films contacting each other throughout their surface areas, said films being of dissimilar materials; and said dissimilar materials being selected so that the laminate layers of said thermal pack do not pass said heat transfer material during heating of the heat transfer material within said thermal pack and do not rupture or separate at the seams thereof when subjected to microwave energy which is equivalent to the energy developed by a microwave heating device operating at full power of about 750 watts for a period of time greater than about one minute but less than about four minutes.
Claim 13
Dependent Claim
36 words
An article of manufacture as set forth in claim 9, wherein said dissimilar materials are synthetic resinous films, or a paper layer adhered to a resinous layer or a fabric layer adhered to a resinous layer.
Claim 14
Dependent Claim
24 words
An article of manufacture as set forth in claim 10, wherein said resinous layer is selected from the group consisting of polyethylene and polyurethane.
Claim 15
Dependent Claim
33 words
An article of manufacture as set forth in claim 9, wherein the inner and outer films of synthetic resins and the inner film is selected from the group consisting of polyethylene and Nylon-Sclair.
Claim 16
Dependent Claim
16 words
An article of manufacture as set forth in claim 12, wherein said outer film is nylon.
Claim 17
Dependent Claim
32 words
An article of manufacture as set forth in claim 13, wherein the outer film has a thickness of about one mil and the inner film has a thickness of about two mils.
Claim 18
Dependent Claim
15 words
The process of claim 1, wherein said period of time is less than three minutes.
Claim 19
Dependent Claim
15 words
The process of claim 1, wherein said period of time is less than two minutes.
Claim 20
Dependent Claim
16 words
The thermal pack of claim 9, wherein said period of time is less than three minutes.
Claim 21
Dependent Claim
16 words
The thermal pack of claim 9, wherein said period of time is less than two minutes.
Claim 22
Dependent Claim
167 words
A process of microwave heating a thermal pack comprising the steps of: providing a thermal pack comprising a completely sealed envelope constructed from opposed laminate layers, said layers defining an inner chamber within which is disposed a heat transfer material, said chamber being sealed from the exterior of said thermal pack, each of said laminate layers including a pair of co-extensive inner and outer films contacting each other throughout their surface areas, said films being of dissimilar materials; applying microwave energy to said pack for heating said heat transfer material to a desired temperature; and selecting the dissimilar materials so that the laminate layers of said thermal pack do not pass said heat transfer material during heating of said thermal pack and do not rupture or separate at the seams thereof when subjected to said microwave energy which is equivalent to the energy developed by a microwave heating device operating at full power of about 750 watts for a period of time equal to about one minute.
Claim 23
Dependent Claim
167 words
A process of microwave heating a thermal pack comprising the steps of: providing a thermal pack comprising a completely sealed envelope constructed from opposed laminate layers, said layers defining an inner chamber within which is disposed a heat transfer material, said chamber being sealed from the exterior of said thermal pack, each of said laminate layers including a pair of co-extensive inner and outer films contacting each other throughout their surface areas, said films being of dissimilar materials; applying microwave energy to said pack for heating said heat transfer material to a desired temperature; and selecting the dissimilar materials so that the laminate layers of said thermal pack do not pass said heat transfer material during heating of said thermal pack and do not rupture or separate at the seams thereof when subjected to said microwave energy which is equivalent to the energy developed by a microwave heating device operating at full power of about 750 watts for a period of time equal to about one minute.
Claim 24
Dependent Claim
15 words
A process as set forth in claim 19, wherein said dissimilar materials are synthetic resins.
Claim 25
Dependent Claim
14 words
A process as set forth in claim 19, wherein said inner film is polyethylene.
Claim 26
Dependent Claim
14 words
A process as set forth in claim 19, wherein the outer film is nylon.
Claim 27
Dependent Claim
26 words
A process as recited in claim 20, wherein said dissimilar materials are synthetic resins and the outer film is nylon and the inner film is Nylon-Sclair.
Claim 28
Dependent Claim
27 words
A process as set forth in claim 22, wherein the outer film has a thickness of one mil and theinner film has a thickness of two mils.
Claim 29
Dependent Claim
152 words
A microwave thermal pack comprising: a completely sealed envelope constructed from opposed laminate layers, portions of which are joined by sealed seams, said layers defining an inner chamber within which is disposed a heat transfer material, said chamber being sealed from the exterior of said thermal pack, each of said laminate layers including a pair of co-extensive inner and outer films contacting each other throughout their surface areas, said films being of dissimilar materials; and said dissimilar materials being selected so that the laminate layers of said thermal pack do not pass said heat transfer material during heating of the heat transfer material within said thermal pack and do not rupture or separate at the seams thereof when subjected to microwave energy which is equivalent to the energy developed by a microwave heating device operating at full power of about 750 watts for a period of time equal to about one minute.
Claim 30
Dependent Claim
152 words
A microwave thermal pack comprising: a completely sealed envelope constructed from opposed laminate layers, portions of which are joined by sealed seams, said layers defining an inner chamber within which is disposed a heat transfer material, said chamber being sealed from the exterior of said thermal pack, each of said laminate layers including a pair of co-extensive inner and outer films contacting each other throughout their surface areas, said films being of dissimilar materials; and said dissimilar materials being selected so that the laminate layers of said thermal pack do not pass said heat transfer material during heating of the heat transfer material within said thermal pack and do not rupture or separate at the seams thereof when subjected to microwave energy which is equivalent to the energy developed by a microwave heating device operating at full power of about 750 watts for a period of time equal to about one minute.
Claim 31
Dependent Claim
36 words
A microwave thermal pack as set forth in claim 25, wherein said dissimilar materials are synthetic resinous films, or a paper layer adhered to a resinous layer or a fabric layer adhered to a resinous layer.
Claim 32
Dependent Claim
24 words
A microwave thermal pack as set forth in claim 26, wherein said resinous layer is selected from the group consisting of polyethylene and polyurethane.
Claim 33
Dependent Claim
33 words
A microwave thermal pack as set forth in claim 25, wherein the inner and outer films of synthetic resins and the inner film is selected from the group consisting of polyethylene and Nylon-Sclair.
Claim 34
Dependent Claim
16 words
A microwave thermal pack as set forth in claim 28, wherein said outer film is nylon.
Claim 35
Dependent Claim
32 words
A microwave thermal pack as set forth in claim 29, wherein the outer film has a thickness of about one mil and the inner film has a thickness of about two mils.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |