US2938103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostat-carrying electrical heating materials for surface application
Assignee: ELECTROFILM Inc
•
Filing: 1958-04-11
•
Granted: 1960-05-24
•
Expires: 1978-04-11
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Crump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:31
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0227; H05B1/0288; H05B1/0294
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1992593A
Cited
US2032294A
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US2421953A
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US2511540A
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US2503457A
Cited
US2441005A
Cited
US2572695A
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US2698893A
Cited
US2719907A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |