Patent US2008541A successfully refreshed from Google Patents.
US2008541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating device
Assignee: Individual
•
Filing: 1933-02-28
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Granted: 1935-07-16
•
Expires: 1953-02-28
Abstract
No abstract record available.
Inventors
- 👤 Drury T Boyd
- 👤 Jay R Wohrley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:09
CPC Classifications
F; F24; F24C; F24C7/00; F24C7/08; F24C7/087; F24C15/00; F24C15/10; F24C15/102; F24C15/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-07-15 | 1939-01-14 | 1939-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-07-15 | 1943-01-14 | 1943-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-07-15 | 1947-01-14 | 1947-07-16 | $7700.00 | Window Closed / Lapsed |