Patent US318884A successfully refreshed from Google Patents.
US3979575A
Expired / Lapsed
US
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Portable electric oven
Assignee: M&M Enterprises Inc
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Filing: 1975-05-29
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Granted: 1976-09-07
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Expires: 1995-05-29
Abstract
Abstract A portable and/or stationary electric oven in which the heating element takes the form of a silicone rubber sheet wrapped around the walls of the oven, and which includes nickel alloy electric heater wires embedded in the silicone rubber sheet.
Inventors
- 👤 Werner H. Maahs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:44
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/62; H05B3/64; F; F27; F27D; F27D11/00; F27D11/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
115 words
An electric oven comprising: a plurality of external wall members; a plurality of internal wall members forming an internal oven compartment; a door closing said oven compartment; a sheet of insulating material formed of silicone rubber wrapped around the internal wall members having a width corresponding substantially to the width of the wall members of the internal wall members and extending as a single layer substantially around the internal wall members forming the oven compartment between the internal and external wall members; and bare electrical resistance wires embedded in the silicone rubber sheet and around said internal wall members and having electrical leads for connection to an electrical energizing source for heating the oven compartment.
Claim 2
Dependent Claim
115 words
An electric oven comprising: a plurality of external wall members; a plurality of internal wall members forming an internal oven compartment; a door closing said oven compartment; a sheet of insulating material formed of silicone rubber wrapped around the internal wall members having a width corresponding substantially to the width of the wall members of the internal wall members and extending as a single layer substantially around the internal wall members forming the oven compartment between the internal and external wall members; and bare electrical resistance wires embedded in the silicone rubber sheet and around said internal wall members and having electrical leads for connection to an electrical energizing source for heating the oven compartment.
Claim 3
Dependent Claim
16 words
The electric oven defined in claim 1, in which the wires are formed of nickel alloy.
References Cited (Backward Citations)
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US1581259A
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US2505117A
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US3155814A
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US3268846A
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US3412234A
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US3800123A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |