Patent US4533807A successfully refreshed from Google Patents.
US4533807A
Expired / Lapsed
US
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Cooking utensil for induction cooking apparatus
Assignee: Asahi Kogyo KK
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Filing: 1985-03-05
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Granted: 1985-08-06
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Expires: 2005-03-05
Abstract
Abstract A cooking utensil for induction cooking apparatus wherein a magnetic substance layer is provided with the purpose of improving the conventional aluminum-made utensil, at outer surface of the bottom of the aluminum utensil body to enable the use with cooking utensil or cooking device with electromagnetic induction heating system by which the effectiveness of both properties of aluminum material and magnetic substance can be obtained and more general use can be obtained than the use of the conventional cooking utensil.
Inventors
- 👤 Ataru Minamida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:08
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/02; H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
A cooking utensil for use with induction heating cooking apparatus, comprising: an aluminum or aluminum alloy utensil body, and a magnetic substance layer provided at at least the outer surface of said utensil body at the bottom thereof; the interface between said magnetic substance layer and said utensil body, being comprised of a plurality of concave and convex faces defined by a series of successive adjacent V-shaped internesting portions at the respective adjoining surfaces of said magnetic substance layer and said utensil body; said utensil body having a flat inwardly directed cooking surface which is coated with a flourine-containing resin; and the said magnetic substance layer being comprised of iron sprayed to the said outer surface of said bottom of said utensil body.
Claim 2
Dependent Claim
123 words
A cooking utensil for use with induction heating cooking apparatus, comprising: an aluminum or aluminum alloy utensil body, and a magnetic substance layer provided at at least the outer surface of said utensil body at the bottom thereof; the interface between said magnetic substance layer and said utensil body, being comprised of a plurality of concave and convex faces defined by a series of successive adjacent V-shaped internesting portions at the respective adjoining surfaces of said magnetic substance layer and said utensil body; said utensil body having a flat inwardly directed cooking surface which is coated with a flourine-containing resin; and the said magnetic substance layer being comprised of iron sprayed to the said outer surface of said bottom of said utensil body.
Claim 3
Dependent Claim
23 words
A cooking utensil according to claim 1 which is characterized in that the said magnetic substance layer has more than 0.1 mm thickness.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |