Patent US4959516A successfully refreshed from Google Patents.
US4959516A
Expired / Lapsed
US
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Susceptor coating for localized microwave radiation heating
Assignee: Dennison Manufacturing Co
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Filing: 1989-05-09
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Granted: 1990-09-25
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Expires: 2009-05-09
Abstract
Abstract A medium formed by a mixture of polymeric binder with conductive metal and either semiconductive particles or galvanic couple alloy particles that can be coated or printed on a substrate to convert electromagnetic radiation to heat without arcing and produce increase heating of foods. Conversion efficiency can be controlled by the choice, thickness, pattern and amount of materials used in the medium. The medium can be formulated to be used repeatedly without burn out or can be formulated to be used only once after which it becomes microwave inert. The conductive particles are typically aluminum, copper, zinc and nickel; the semiconductive particles are typically carbon, titanium carbide, silicon carbide and zinc oxide; and the galvanic couple alloy particles are typically aluminum-nickel alloy, aluminum-cobalt alloy and aluminum-copper alloy.
Inventors
- 👤 Laurence E. Tighe
- 👤 Tim Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:11
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/34; B65D81/3446; B65D2581/00; B65D2581/34; B65D2581/3437; B65D2581/3439; B65D2581/344; B65D2581/3443; B65D2581/3447; B65D2581/3448; B65D2581/3451; B65D2581/3463; B65D2581/3464; B65D2581/3471; B65D2581/3472; B65D2581/3474; B65D2581/3477; B65D2581/3479; B65D2581/3483; B65D2581/3486; B65D2581/3494; Y; Y10; Y10S; Y10S99/00; Y10S99/14
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
A microwave susceptor coating panel which comprises a heat resistant substrate and a susceptor coating on said substrate; said susceptor coating comprising a combination of metallic particles and galvanic couple alloy particles, and a heat resistant polymeric binder wherein said coating converts microwave radiation to heat sufficient to cause heating to a temperature of at least 350° F. (177° C.) within about 4 minutes at a conventional microwave power output level of 700 watts at a frequency of 2450 Megahertz.
Claim 2
Dependent Claim
80 words
A microwave susceptor coating panel which comprises a heat resistant substrate and a susceptor coating on said substrate; said susceptor coating comprising a combination of metallic particles and galvanic couple alloy particles, and a heat resistant polymeric binder wherein said coating converts microwave radiation to heat sufficient to cause heating to a temperature of at least 350° F. (177° C.) within about 4 minutes at a conventional microwave power output level of 700 watts at a frequency of 2450 Megahertz.
Claim 3
Dependent Claim
22 words
A susceptor panel as defined in claim 1 wherein the metal particles comprise aluminum in flaked, powdered, fiber, needle, or fluff form.
Claim 4
Dependent Claim
22 words
A susceptor panel as defined in claim 2 wherein the average particle size of the aluminum is between 6 to 34 microns.
Claim 5
Dependent Claim
22 words
A susceptor panel as in claim 1 wherein the galvanic couple alloy particles comprises aluminum-nickel alloy and the metallic particles comprises aluminum.
Claim 6
Dependent Claim
16 words
A susceptor panel as defined in claim 4 wherein the susceptor coating further comprises potassium bisulfate.
Claim 7
Dependent Claim
29 words
A susceptor panel as defined in claim 1 wherein the weight ratio of metallic particles to galvanic couple alloy particles is in a range between about 2:1 to 1:2.
Claim 8
Dependent Claim
32 words
A susceptor panel as defined in claim 1 wherein the metal particles comprise aluminum and the galvanic couple alloy particles are selected from the group consisting of aluminum-cobalt alloy and aluminum-copper alloy.
Claim 9
Dependent Claim
28 words
A susceptor panel as defined in claims 1 or 7 wherein the galvanic couple alloy average particle size is in a range between about 1 to 150 microns.
Claim 10
Dependent Claim
34 words
A susceptor panel as defined in claim 1 wherein said panel is limited to one use after which it becomes microwave inert and wherein said panel can be formed to shaped or contoured configuration.
Claim 11
Dependent Claim
26 words
A susceptor panel as defined in claim 1 wherein the thickness of said susceptor coating is in a range between about 6 microns to 250 microns.
Claim 12
Dependent Claim
38 words
A susceptor panel as defined in claim 1 wherein the susceptor coating is applied to a temporary carrier and said susceptor coating is transferable to a surface by a heat resistant adhesive layer applied over the susceptor coating.
Claim 13
Dependent Claim
41 words
A susceptor coating panel as defined in claim 1 wherein said binder is selected from the class consisting of polyimides, polysulfones, polyarylsulfones, polyetherimides, amide-imides, polyethersulfones, polyamides, polycarbonates, epoxies, allyls, phenolics, polyesters, fluorocarbons, acetals, alkyds, furan, melamines, polyphenylenes, polyphenylen sulfides and silicones.
Claim 14
Dependent Claim
37 words
A microwave susceptor coating panel as defined in claim 1 wherein the thickness, area covered and pattern of the susceptor coating is selected to control the heat up rate and amount of heat converted from electromagnetic energy.
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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) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |