US3593702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonstick resin-coated cooking utensils
Assignee: Individual
•
Filing: 1969-12-10
•
Granted: 1971-07-20
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Expires: 1989-12-10
Abstract
Abstract The disclosure describes a cooking utensil, such as a frying pan, comprising a vessel-forming aluminum body having one or more preferably annular protusions downwardly projecting from its planar bottom for abutment on the parts and surfaces whereon the utensil are superimposed and supported for use, said body having its inner and outer surfaces coated with polytetrafluoroethylene (or equivalent nonstick resin) in their entirety except at the tips of said protusions where said abutment actually occurs.
Inventors
- 👤 Emanuele Zigomalas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:15
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
23 words
The improved utensil of claim 1, wherein said protruding parts are of uninterrupted annular configuration parallel to the contour of said planar bottom.
Claim 2
Dependent Claim
15 words
The improved utensil of claim 2, comprising a plurality of concentrically arranged annular protruding parts.
Claim 3
Dependent Claim
37 words
The improved utensil of claim 2, which comprises one uncoated annular part adjacent to and inwardly extended from the outer border of said planar bottom and circumscribing a recessed planar area coated with said repellent resinous material.
Claim 4
Dependent Claim
50 words
The improved utensil of claim 1, which comprises protruding parts including a planar narrow downturned face in said plane of abutment and flank portions, the said layer of repellent resinous material extending to cover said flank portions while the metal of said metallic body is uncovered at said downturned face.
Claim 5
Dependent Claim
18 words
The improved utensil of claim 1, which comprises downturned protruding parts integrally formed with said metallic body thereof.
Claim 6
Dependent Claim
54 words
The improved utensil of claim 6, wherein the said protruding parts are formed by turning metal off from a blank of thickness equal to the thickness of its body bottom portion including said nonstick surface plus the projection of said protruding parts from the plane defined by the lower face of said bottom portion.
Claim 7
Independent Claim
237 words
The method for producing an improved cooking utensil, such as a stewing pan, a frying pan, or other vessel or pot for cooking food, boiling milk and the like, comprising a metallic preferably an aluminum body having a planar bottom and upWardly turned sidewalls, the inner surface of said body being provided with an adherent nonstick layer of a suitable repellent resinous material, comprising the steps of i. providing a planar blank of aluminum sheeting, of such shape and dimension for forming a cooking vessel having a bottom and sidewalls therefrom, ii. providing said planar blank with annular protusion means projecting from one face of said planar blank in the center portion thereof, where the said planar bottom of the vessel will be formed, iii. coating both faces of said planar blank, the areas adjacent to said protusion means and the flanks of same protusion means inclusive, with an adherent layer of nonstick resinous material, iv. forming a hollow cooking vessel shape from thus coated blank, said vessel having said protusion projecting from the lower face of its bottom, and v. removing the coating layer and material from the top of said protusion means for uncovering the metal of said protusion means for uncovering the metal thereat, to provide narrow uncoated annular areas where the cooking utensil contacts the parts on which it is superimposed for use, while the nonstick surface areas are protected against such contact.
Claim 8
Dependent Claim
30 words
The method of claim 8, wherein said annular protusion means are formed by recessing one face of said blank at its surface portions adjacent to the protusions to be formed.
Claim 9
Dependent Claim
48 words
The method of claim 8, wherein the removing of the coating layer from the top of said protusion is made by machining said top for cutting it along a plane parallel to and spaced from the faces of said blank and incident the metal contained in said protusions.
References Cited (Backward Citations)
US1970151A
Cited
US3008601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |