US4868360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwaveable/stovetop cooking utensil
Assignee: Corning Glass Works
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Filing: 1987-10-30
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Granted: 1989-09-19
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Expires: 2007-10-30
Abstract
Abstract An improved metallic cooking utensil suitable for use both in stovetop cooking such as frying and in a microwave oven is disclosed. The utensil features a bowl member formed of a single piece of stainless steel having a relatively square cut-off edge, that is, without a rolled-over edge or other complex edge detail. The upper portion of the disk member forms a circumferential flange which is extended at least two points to receive handles. The handles are formed of a microwave-transparent polymer material, and are affixed to the extended portions of the flange by rivets extending through square holes formed in the flange extensions. The bowl defines a relatively broad radius between its bottom portion and the upper flange, and may have a heat conductive element plated onto or affixed to its bottom for improvement of its heat conducting characteristics.
Inventors
- 👤 John K. Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:03
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/02; A47J36/027; Y; Y10; Y10S; Y10S99/00; Y10S99/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
108 words
A microwaveable/stovetop cooking utensil, comprising: a bowl member, formed of a single sheet of metal, said bowl member having a flat bottom surface portion, a peripheral wall portion, and a broad radius transition portion joining said bottom surface portion to said peripheral wall portion which transition portion focuses microwave energy toward the center of the dish and further comprising a square-edged flange at the upper extremity of said wall portion, said flange having at least two extensions for receiving handle members; and handle members affixed to said at least two extensions of said flange, said handle members being formed of a material which is transparent to microwave energy.
Claim 2
Dependent Claim
108 words
A microwaveable/stovetop cooking utensil, comprising: a bowl member, formed of a single sheet of metal, said bowl member having a flat bottom surface portion, a peripheral wall portion, and a broad radius transition portion joining said bottom surface portion to said peripheral wall portion which transition portion focuses microwave energy toward the center of the dish and further comprising a square-edged flange at the upper extremity of said wall portion, said flange having at least two extensions for receiving handle members; and handle members affixed to said at least two extensions of said flange, said handle members being formed of a material which is transparent to microwave energy.
Claim 3
Dependent Claim
27 words
The utensil of claim 1, wherein the lower portion of said bowl is plated with a material of higher heat conductivity than the material of said bowl.
Claim 4
Dependent Claim
20 words
The utensil of claim 2 wherein the material of said bowl is stainless steel and the plated material is copper.
Claim 5
Dependent Claim
45 words
The utensil of claim 1 in combination with a heat conductive element affixed to the lower portion of said bowl member in intimate heat conductive relationship therewith, said heat conductive element being formed of material of higher heat conductivity than the material of said bowl.
Claim 6
Dependent Claim
23 words
The utensil of claim 4 wherein said heat conductive member is formed of aluminum, and the material of said bowl is stainless steel.
Claim 7
Dependent Claim
18 words
The utensil of claim 5 wherein said aluminum member is further coated by a layer of stainless steel.
Claim 8
Dependent Claim
23 words
The utensil of claim 1 wherein said handles are affixed to at least two extensions of said flange by a plurality of rivets.
Claim 9
Dependent Claim
18 words
The utensil of claim 7 wherein said rivets pass through square holes in said extensions of said flange.
Claim 10
Dependent Claim
26 words
The utensil of claim 8 wherein said square holes are spaced at least about 2" from one another on each of said extensions of said flanges.
Claim 11
Dependent Claim
37 words
The utensil of claim 1 wherein the radius of said transition portion varies between about 1.25" where said transition portion joins said flat bottom surface portion and about 2.50" where said transition portion joins said wall portion.
Claim 12
Dependent Claim
25 words
The utensil of claim 10 wherein said bowl is formed to have a radius of about 0.125" where said wall portion meets said flange portion.
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) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |