Patent US3346720A successfully refreshed from Google Patents.
US3346720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared surface heating unit with corrugated ribbon-shaped filament
Assignee: Motors Liquidation Co
•
Filing: 1965-05-25
•
Granted: 1967-10-10
•
Expires: 1985-05-25
Abstract
No abstract record available.
Inventors
- 👤 Donald C Siegla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:08
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/68; H05B3/74; H05B3/748
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A COOKING ASSEMBLY COMPRISING, A SHEET OF INFRARED TRANSMISSIVE NON-METALLIC MATERIAL INCLUDING AN UPPER UTENSIL SUPPORTING SURFACE, SAID SHEET OF NON-METALLIC MATERIAL HAVING A THERMAL CONDUCTIVITY OF SUBSTANTIALLY .5 TO 2.5 B.T.U. PER HOUR FOOR DEGREE F., A PLURALITY OF INFRARED HEATING UNITS, MEANS FOR SUPPORTING EACH OF SAID HEATING UNITS ON THE UNDERSIDE OF SAID SHEET IN SPACED RELATIONSHIP WITH ONE ANOTHER, EACH OF SAID HEATING UNITS INCLUDING AN UNINSULATED ELECTRICAL RESISTANCE ELEMENT LOCATED IN SPACED RELATIONSHIP WITH SAID SHEET, SAID EACH OF SAID HEATING UNITS HAVING A PREDETERMINED PLANAR EXTENT AND BEING ENERGIZABLE INTO THE INFRARED
Claim 2
Dependent Claim
98 words
A COOKING ASSEMBLY COMPRISING, A SHEET OF INFRARED TRANSMISSIVE NON-METALLIC MATERIAL INCLUDING AN UPPER UTENSIL SUPPORTING SURFACE, SAID SHEET OF NON-METALLIC MATERIAL HAVING A THERMAL CONDUCTIVITY OF SUBSTANTIALLY .5 TO 2.5 B.T.U. PER HOUR FOOR DEGREE F., A PLURALITY OF INFRARED HEATING UNITS, MEANS FOR SUPPORTING EACH OF SAID HEATING UNITS ON THE UNDERSIDE OF SAID SHEET IN SPACED RELATIONSHIP WITH ONE ANOTHER, EACH OF SAID HEATING UNITS INCLUDING AN UNINSULATED ELECTRICAL RESISTANCE ELEMENT LOCATED IN SPACED RELATIONSHIP WITH SAID SHEET, SAID EACH OF SAID HEATING UNITS HAVING A PREDETERMINED PLANAR EXTENT AND BEING ENERGIZABLE INTO THE INFRARED
References Cited (Backward Citations)
BE521735A
Cited
CA621927A
Cited
US2179934A
Cited
US2471884A
Cited
US2640906A
Cited
US2727133A
Cited
US2799765A
Cited
US2870316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |