US2481963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated fan-radiator apparatus
Assignee: Individual
•
Filing: 1946-02-27
•
Granted: 1949-09-13
•
Expires: 1966-02-27
Abstract
No abstract record available.
Inventors
- 👤 Samuel A Witte
- 👤 William W Wittie
- 👤 Philip W Wittie
- 👤 Witte Nicholas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:07
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/08; F24H3/081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1848716A
Cited
US1053552A
Cited
US1767082A
Cited
US1986350A
Cited
US1938833A
Cited
US2030316A
Cited
US2151140A
Cited
US2257342A
Cited
US2360071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |