Patent US4350259A successfully refreshed from Google Patents.
US4350259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stainless steel container with thermoradiating bottom
Assignee: AMC International Alfa Metalcraft Corp AG
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Filing: 1980-09-30
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Granted: 1982-09-21
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Expires: 2000-09-30
Abstract
Abstract A container is equipped at the bottom thereof with an aluminum layer of considerable thickness, as compared with the thickness of the said bottom, the said layer incorporating a plate of rolled steel, thoroughly anchored in the said layer, in such a way that at least part of the surface thereof projects from the face of the said aluminum layer. To ensure the anchorage of the rolled steel plate, the latter is provided with openings through which the aluminum penetrates and wherein it anchors.
Inventors
- 👤 Ferdinando Cartossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:29
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
Stainless steel container provided with a first integral heat-radiating stainless steel bottom, a second complemental bottom composed of aluminum or alloys thereof having a first tight restrained bond joining it to a bottom side of the heat-radiating stainless steel bottom, and a steel plate or an iron plate having a second bond securing it to a bottom side of said aluminum bottom, said first and second bonds having physical characteristics resultant from preheating of the bottoms and from then subjecting the heated bottoms to high pressure, a rim of the rolled steel plate being at least partly coated and provided with openings, the aluminum of the layer which forms the bottom of the container extending through the openings in anchored assembly.
Claim 2
Dependent Claim
121 words
Stainless steel container provided with a first integral heat-radiating stainless steel bottom, a second complemental bottom composed of aluminum or alloys thereof having a first tight restrained bond joining it to a bottom side of the heat-radiating stainless steel bottom, and a steel plate or an iron plate having a second bond securing it to a bottom side of said aluminum bottom, said first and second bonds having physical characteristics resultant from preheating of the bottoms and from then subjecting the heated bottoms to high pressure, a rim of the rolled steel plate being at least partly coated and provided with openings, the aluminum of the layer which forms the bottom of the container extending through the openings in anchored assembly.
Claim 3
Dependent Claim
84 words
Cookware, comprising: (a) a preformed vessel of stainless steel having a bottom; (b) two superimposed aluminum discs and an inductively susceptible ferrous disc disposed therebetween, the group of discs having one side disposed against said vessel bottom; (c) said inductively susceptible disc having an apertured rim making it cup-shaped and flush with the periphery of the aluminum disc bonded to said bottom, and jacketing the other aluminum disc; and (d) each aperture of said rim having aluminum projecting radially therein from the jacketed disc.
Claim 4
Dependent Claim
84 words
Cookware, comprising: (a) a preformed vessel of stainless steel having a bottom; (b) two superimposed aluminum discs and an inductively susceptible ferrous disc disposed therebetween, the group of discs having one side disposed against said vessel bottom; (c) said inductively susceptible disc having an apertured rim making it cup-shaped and flush with the periphery of the aluminum disc bonded to said bottom, and jacketing the other aluminum disc; and (d) each aperture of said rim having aluminum projecting radially therein from the jacketed disc.
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) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |