US4800247A
Expired / Lapsed
US
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Microwave heating utensil
Assignee: Commercial Decal Inc
•
Filing: 1987-04-03
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Granted: 1989-01-24
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Expires: 2007-04-03
Abstract
Abstract A microwave heating utensil is provided with a microwave absorbent susceptor material which includes zinc and manganese. The susceptor material may be disposed in a layer on the surface of the body and a continuous cover layer overlying the susceptor material may be fused with the utensil body. A preformed layer comprising a susceptor-forming material including zinc and manganese, together with a glass moderator material, and a further preformed layer including the cover material in particulate form may be applied to the body by transferring these layers from a decal substrate. The continuous cover layer may be formed by fusion of the particulate cover material in heating, typically in an oxidizing atmosphere.
Inventors
- 👤 Marvin Schneider
- 👤 Louis A. Blanco
- 👤 Salvatore A. Milo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:46
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/647; H05B6/6491; H05B6/6494; A; A47; A47J; A47J36/00; A47J36/02; A47J36/04
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
30 words
A microwave heating utensil comprising a substantially microwave-transparent body and a particulate susceptor material fixed to said body, said susceptor material comprising zinc and one or more zinc antioxidant metals.
Claim 2
Dependent Claim
30 words
A microwave heating utensil comprising a substantially microwave-transparent body and a particulate susceptor material fixed to said body, said susceptor material comprising zinc and one or more zinc antioxidant metals.
Claim 3
Dependent Claim
25 words
A microwave heating utensil comprising a substantially microwave-transparent body and a particulate susceptor material fixed to said body, said susceptor material comprising zinc and manganeses.
Claim 4
Dependent Claim
25 words
A microwave heating utensil comprising a substantially microwave-transparent body and a particulate susceptor material fixed to said body, said susceptor material comprising zinc and manganeses.
Claim 5
Dependent Claim
23 words
A utensil as claimed in claim 2 wherein said susceptor material is disposed in a susceptor layer on a surface of said body.
Claim 6
Dependent Claim
17 words
A utensil as claimed in claim 3, further comprising an electrically non-conductive moderator in said susceptor layer.
Claim 7
Dependent Claim
34 words
A microwave heating utensil as claimed in claim 4 further comprising a continuous cover layer of a substantially microwave-transparent cover material closely overlying said susceptor layer, said cover layer being fused to said body.
Claim 8
Dependent Claim
30 words
A utensil as claimed in claim 5 wherein said body is formed from a glass or ceramic material and said cover material consists essentially of a glass or ceramic material.
Claim 9
Dependent Claim
24 words
A utensil as claimed in claim 6 wherein said body is formed from a glass-ceramic material and said cover layer consists essentially of glass.
Claim 10
Dependent Claim
27 words
A utensil as claimed in claim 4 wherein the ratio of zinc to manganese in said susceptor material is between about 80:8 and about 80:18 by weight.
Claim 11
Dependent Claim
17 words
A utensil as claimed in claim 8 wherein said ratio of zinc to manganese is about 80:13.
Claim 12
Dependent Claim
29 words
A utensil as claimed in claim 8 wherein the metal mass per unit area of said susceptor layer is about 4 mg/cm 2 to about 10 mg/cm 2 .
Claim 13
Independent Claim
91 words
A method of making a microwave heating utensil comprising the steps of: (a) providing a body; (b) applying a susceptor layer of a particulate susceptor-forming material including zinc and one or more zinc antioxidant metals over a surface of said body; (c) applying a cover layer of a particulate fusible cover material over said susceptor layer; (d) heating said layers so as to fuse said cover material to form a continuous cover layer and ufse said cover layer to said body, thereby forming a unitary utensil; and (e) cooling said utensil.
Claim 14
Independent Claim
91 words
A method of making a microwave heating utensil comprising the steps of: (a) providing a body; (b) applying a susceptor layer of a particulate susceptor-forming material including zinc and one or more zinc antioxidant metals over a surface of said body; (c) applying a cover layer of a particulate fusible cover material over said susceptor layer; (d) heating said layers so as to fuse said cover material to form a continuous cover layer and ufse said cover layer to said body, thereby forming a unitary utensil; and (e) cooling said utensil.
Claim 15
Dependent Claim
13 words
A microwave heating utensil made by a method as claimed in claim 11.
Claim 16
Independent Claim
86 words
A method of making a microwave heating utensil comprising the steps of: (a) providing a body; (b) applying a susceptor layer of a particulate susceptor-forming material including zinc and manganese over a surface of said body; (c) applying a cover layer of a particulate fusible cover material over said susceptor layer; (d) heating said layers so as to fuse said cover material to form a continuous cover layer and fuse said cover layer to said body, thereby forming a unitary untensil; and (e) cooling said utensil.
Claim 17
Independent Claim
86 words
A method of making a microwave heating utensil comprising the steps of: (a) providing a body; (b) applying a susceptor layer of a particulate susceptor-forming material including zinc and manganese over a surface of said body; (c) applying a cover layer of a particulate fusible cover material over said susceptor layer; (d) heating said layers so as to fuse said cover material to form a continuous cover layer and fuse said cover layer to said body, thereby forming a unitary untensil; and (e) cooling said utensil.
Claim 18
Dependent Claim
43 words
A method as claimed in claim 13 wherein both said susceptor layer and said cover layer are provided as performed layers on a decal substrate and are applied to said body by transferring said performed layers from said decal substrate to said body.
Claim 19
Dependent Claim
30 words
A method as claimed in claim 13 wherein said body is formed from a glass or ceramic material and said cover material consists essentially of a glass or ceramic material.
Claim 20
Dependent Claim
29 words
A method as claimed in claim 13 wherein said susceptor-forming material includes zinc and manganese in the reduced state, and said heating step is performing in an oxidizing atmosphere.
Claim 21
Dependent Claim
30 words
A method as claimed in claim 16 wherein said susceptor layer includes a particulate fusible moderator, in addition to said susceptor-forming material, said moderator being fused during said heating step.
Claim 22
Dependent Claim
17 words
A method as claimed in claim 17 wherein said susceptor-forming material consists essentially of zinc and manganese.
Claim 23
Dependent Claim
26 words
A method as claimed in claim 18 wherein the ratio of zinc to manganese by weight in said susceptor-forming material is about 80:8 to about 80:18.
Claim 24
Dependent Claim
42 words
A method as claimed in claim 19 wherein said moderator consists essentially of glass and the ratio of said susceptor-forming material to said moderator by weight in said susceptor layer prior to said heating step is between about 88:12 and about 98:2.
Claim 25
Dependent Claim
21 words
A method as claimed in claim 20 wherein said ratio of zinc to manganese is said susceptor-forming material is about 80:13.
Claim 26
Dependent Claim
18 words
A method as claimed in claim 21 wherein said ratio of susceptor-forming material to moderator is about 93:7.
Claim 27
Dependent Claim
25 words
A method as claimed in claim 22 wherein the mean particle sizes of said susceptor-forming material and said moderator are about 20 microns or less.
Claim 28
Dependent Claim
13 words
A microwave heating utensil made by a method as claimed in claim 23.
Claim 29
Dependent Claim
33 words
A decal for making a microwave heating utensil comprising a substrate, and a susceptor layer comprising a particulate susceptor-forming material including zinc and one or more zinc antioxidant metals secured to said substrate.
Claim 30
Dependent Claim
33 words
A decal for making a microwave heating utensil comprising a substrate, and a susceptor layer comprising a particulate susceptor-forming material including zinc and one or more zinc antioxidant metals secured to said substrate.
Claim 31
Dependent Claim
28 words
A decal for making a microwave heating utensil comprising a substrate, and a susceptor layer comprising a particulate susceptor-forming material including zinc and manganese secured to said substrate.
Claim 32
Dependent Claim
28 words
A decal for making a microwave heating utensil comprising a substrate, and a susceptor layer comprising a particulate susceptor-forming material including zinc and manganese secured to said substrate.
Claim 33
Dependent Claim
31 words
A decal as claimed in claim 35 further comprising a cover layer including a particulate fusible cover material consisting essentially of a glass or ceramic material disposed adjacent said susceptor layer.
Claim 34
Dependent Claim
24 words
A decal as claimed in claim 27 wherein said susceptor layer includes a particulate, fusible electrically non-conductive moderator in addition to said susceptor-forming material.
Claim 35
Dependent Claim
26 words
A decal as claimed in claim 28 wherein the ratio of zinc to manganese by weight in said susceptorforming material is about 80:8 to about 80:18.
Claim 36
Dependent Claim
42 words
A decal as claimed in claim 29 wherein said moderator consists essentially of glass and the ratio of said susceptor-forming material to said moderator by weight in said susceptor layer prior to said heating step is between about 88:12 and about 98:2.
Claim 37
Dependent Claim
21 words
A decal as claimed in claim 30 wherein said ratio of zinc to manganese in said susceptor-forming material is about 80:13.
Claim 38
Dependent Claim
18 words
A decal as claimed in claim 31 wherein said ratio of susceptor-forming material to moderator is about 93:7.
Claim 39
Dependent Claim
26 words
A decal as claimed in claim 32 wherein said susceptor layer includes between about 4 mg/cm 2 and about 10 mg/cm 2 of said susceptor-forming material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-24 | 1992-07-25 | 1993-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-24 | 1996-07-25 | 1997-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-24 | 2000-07-25 | 2001-01-24 | $7700.00 | Window Closed / Lapsed |