Patent US3623630A successfully refreshed from Google Patents.
US3623630A
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US
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Infiltrated powdered metal cooking utensil
Assignee: Individual
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Filing: 1969-04-29
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Granted: 1971-11-30
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Expires: 1989-04-29
Abstract
Abstract The invention concerns a powdered metal cooking utensil with the powdered metal member having at least a region through which heat is transferred to the material and with the said region being infiltrated by a metal having a higher coefficient for heat conductivity than the powdered metal.
Inventors
- 👤 John E Rode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:08
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T428/00; Y10T428/12; Y10T428/12007; Y10T428/12014; Y10T428/12028; Y10T428/12049; Y10T428/12056; Y10T428/1216; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917; Y10T428/12924
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A cooking utensil comprising a member in the form of a porous skeletal structure of compacted and sintered powdered metal selected from the group consisting essentially of iron and stainless steel and another metal selected from the group consisting essentially of copper and copper alloys infiltrated into said skeletal structure in at least that portion of said article to which heat is applied to enhance the heat conductivity of the said portion, said infiltrated metal extending completely through said portion of said cooking utensil.
Claim 2
Dependent Claim
84 words
A cooking utensil comprising a member in the form of a porous skeletal structure of compacted and sintered powdered metal selected from the group consisting essentially of iron and stainless steel and another metal selected from the group consisting essentially of copper and copper alloys infiltrated into said skeletal structure in at least that portion of said article to which heat is applied to enhance the heat conductivity of the said portion, said infiltrated metal extending completely through said portion of said cooking utensil.
Claim 3
Dependent Claim
35 words
A cooking utensil according to claim 1 which includes a bottom wall part and an upstanding sidewall part and said infiltrated portion comprises at least the entirety of said bottom wall part of said container.
Claim 4
Dependent Claim
32 words
A cooking utensil according to claim 2 which includes a nonporous sealant material selected from the group consisting essentially of polyester resin and polytetrafluorethylene applied to said sidewall part of the container.
Claim 5
Dependent Claim
16 words
A cooking utensil according to claim 3 in which said sealant material impregnates said sidewall part.
Claim 6
Dependent Claim
25 words
A cooking utensil according to claim 3 in which said sealant material is in the form of a film on the inside of said container.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |