US2880809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling fan blade
Assignee: Individual
•
Filing: 1956-06-26
•
Granted: 1959-04-07
•
Expires: 1976-06-26
Abstract
No abstract record available.
Inventors
- 👤 Wesley R Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:33
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/06; F01P5/00; F01P5/02; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34; F04D29/36; F04D29/362; F04D29/364; F01P2011/063; F01P5/04; F01P5/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1496776A
Cited
US2243046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |