Patent US1693303A successfully refreshed from Google Patents.
US3105138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery powered heater for conserves
Assignee: Individual
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Filing: 1961-12-07
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Granted: 1963-09-24
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Expires: 1981-12-07
Abstract
No abstract record available.
Inventors
- 👤 Gazdik Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:57
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/24; A47J36/2483
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
143 words
A PORTABLE HEATER, COMPRISING A CYLINDRICAL BASE OF ELECTRICALLY INSULATING MATERIAL, A CONDUCTIVE LINING IN THE BASE, A PLURALITY OF BATTERIES STANDING IN SAID BASE WITH ELECTRICALLY NEGATIVE CASES OF THE BATTERIES IN CONTACT WITH SAID LINING, A TRAY OF ELECTRICALLY INSULATING MATERIAL REMOVBLY SEATED ON THE BASE, ELECTRIC WIRE HEATER COILS SEATED IN GROOVES IN THE BOTTOM OF THE TRAY, AN ELECTRICALLY CONDUCTIVE RING CARRIED BY THE TRAY AND CONNECTED IN CIRCUIT WITH ONE END OF SAID COILS, SAID RING CONTACTING SAID LINING, AN ELECTRICALLY CONDUCTIVE DISK CONNECTED TO ANOTHER END OF SAID COILS, SAID DISK BEING SEATED IN A RECESS IN THE BOTTOM OF THE TRAY, AN ELECTRICALLY CONDUCTIVE PLATE SEATED AND PERIPHERALLY ENGAGED ON POSITIVE TERMINALS OF THE BATTERIES, AND A SPRING DISPOSED BETWEEN SAID CONDUCTIVE PLATE AND DISK COMPLETING AN ELECTRICAL CIRCUIT THEREBETWEEN WHEREBY THE HEATER COILS ARE ENERGIZED.
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |