US4864089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Localized microwave radiation heating
Assignee: Dennison Manufacturing Co
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Filing: 1988-05-16
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Granted: 1989-09-05
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Expires: 2008-05-16
Abstract
Abstract A medium formed by a resin binder with conductive and semiconductive particles that can be coated on a substrate to convert electromagnetic radiation to heat. Conversion efficiency can be controlled by the choice and amount of materials used in the medium, which can be used repeatedly without burn out.
Inventors
- 👤 Laurence E. Tighe
- 👤 Tim Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:43
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: 17
Claim 1
Independent Claim
116 words
A microwave susceptor package for controlled conversion of microwave radiation to heat to brown or crispen food contained in the package without causing arcing, comprising: a substrate which is configured to hold food to be heated; and a fluid medium coated or selectively printed on said substrate, comprising a reisn binder selected from the groups consisting of polysulfones, polyethersulfones, polyolefins, epoxies, phenolics, polystyrenes, phenoxies, halocarbons, acrylics, and vinyls; and a filler comprising metallic particles and semiconductor carbon black particles dispersed in said resin binder in a weight ratio of metallic particles to semiconductor particles of between 5:1 to 30:1, said metallic particles being selected from the group consisting of nickel, iron, zinc, copper, and aluminum particles.
Claim 2
Dependent Claim
116 words
A microwave susceptor package for controlled conversion of microwave radiation to heat to brown or crispen food contained in the package without causing arcing, comprising: a substrate which is configured to hold food to be heated; and a fluid medium coated or selectively printed on said substrate, comprising a reisn binder selected from the groups consisting of polysulfones, polyethersulfones, polyolefins, epoxies, phenolics, polystyrenes, phenoxies, halocarbons, acrylics, and vinyls; and a filler comprising metallic particles and semiconductor carbon black particles dispersed in said resin binder in a weight ratio of metallic particles to semiconductor particles of between 5:1 to 30:1, said metallic particles being selected from the group consisting of nickel, iron, zinc, copper, and aluminum particles.
Claim 3
Dependent Claim
28 words
The microwave susceptor package of claim 1 wherein the metallic particles comprise aluminum flake, powder, fluff, fiber or needles with a particle size in the range 1-19 microns.
Claim 4
Dependent Claim
21 words
The microwave susceptor package of claim 1 wherein the carbon black particles have a particle size in the range 15-70 microns.
Claim 5
Dependent Claim
15 words
The microwave susceptor package of claim 1 wherein the fluid medium further comprises an antioxidant.
Claim 6
Dependent Claim
28 words
The microwave susceptor package of claim 1 wherein the fluid medium prior to printing or coating on the substrate further comprises excess solvent and diluent to control viscosity.
Claim 7
Dependent Claim
17 words
The microwave susceptor package of claim 1 wherein the substrate comprises a plastic film laminated to paperboard.
Claim 8
Dependent Claim
27 words
The microwave susceptor package of claim 6 wherein the plastic film is selected from the group consisting of polyester, polyimide, polyetherimide, nylon, cellophane, polyethersulphone and polyvinylidine chloride.
Claim 9
Dependent Claim
21 words
The microwave susceptor package of claim 1 wherein the weight ratio of metallic particles to carbon black particles is about 13:1.
Claim 10
Dependent Claim
16 words
The microwave susceptor package as defined in claim 1 wherein the substrate comprises a ceramic tray.
Claim 11
Dependent Claim
97 words
A microwave susceptor package for controlled conversion of microwave radiation to heat to brown or crispen food contained in the package without causing arcing, comprising: a substrate which is configured to hold food to be heated; and a fluid medium coated or selectively printed on said substrate, comprising a resin binder selected from the group consisting of polysulfones, polyethersulphones, epoxies, phenolics, polystyrenes, phenoxies, halocarbons, acrylics, and vinyls; and a filler comprising aluminum particles and carbon black particles dispersed in said resin binder in a weight ratio of aluminum to particles carbon black particles from 5:1 to 30:1.
Claim 12
Dependent Claim
97 words
A microwave susceptor package for controlled conversion of microwave radiation to heat to brown or crispen food contained in the package without causing arcing, comprising: a substrate which is configured to hold food to be heated; and a fluid medium coated or selectively printed on said substrate, comprising a resin binder selected from the group consisting of polysulfones, polyethersulphones, epoxies, phenolics, polystyrenes, phenoxies, halocarbons, acrylics, and vinyls; and a filler comprising aluminum particles and carbon black particles dispersed in said resin binder in a weight ratio of aluminum to particles carbon black particles from 5:1 to 30:1.
Claim 13
Independent Claim
94 words
A method of producing a microwave susceptor package or container for controlled conversion of microwave radiation to heat without causing arcing during use, comprising: (a) mixing a resin solution and a dispersant solution, said resin solution comprising a heat resistant thermoplastic or thermoset resin; (b) dispersing metallic particles and carbon black particles in said mixture in a weight ratio from 5:1 to 30:1 metallic particles to carbon black particles, said metallic particles being selected from the group consisting of nickel, iron, zinc, copper, and aluminum particles; and depositing the resulting material on a substrate.
Claim 14
Independent Claim
94 words
A method of producing a microwave susceptor package or container for controlled conversion of microwave radiation to heat without causing arcing during use, comprising: (a) mixing a resin solution and a dispersant solution, said resin solution comprising a heat resistant thermoplastic or thermoset resin; (b) dispersing metallic particles and carbon black particles in said mixture in a weight ratio from 5:1 to 30:1 metallic particles to carbon black particles, said metallic particles being selected from the group consisting of nickel, iron, zinc, copper, and aluminum particles; and depositing the resulting material on a substrate.
Claim 15
Dependent Claim
11 words
The method of claim 11 wherein the depositing step comprises coating.
Claim 16
Dependent Claim
12 words
The method of claim 11 wherein the depositing step comprises selective printing.
Claim 17
Dependent Claim
16 words
The method of claim 11 wherein the dispersant solution comprises a diluent and a wetting agent.
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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) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |