US2678993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Woven resistance or heater device
Assignee: Individual
•
Filing: 1952-03-13
•
Granted: 1954-05-18
•
Expires: 1972-03-13
Abstract
No abstract record available.
Inventors
- 👤 Boer Gerard W De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:06
CPC Classifications
F; F24; F24D; F24D13/00; F24D13/02; Y; Y02; Y02B; Y02B30/00; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49098; Y10T29/49101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1036632A
Cited
GB108516A
Cited
US1436384A
Cited
US1456223A
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US1571878A
Cited
US1811081A
Cited
US2251697A
Cited
US2298181A
Cited
US2467349A
Cited
US2432785A
Cited
US2581212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |