US2437810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable pitch fan blade assembly
Assignee: Evans Products Co
•
Filing: 1944-11-20
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Granted: 1948-03-16
•
Expires: 1964-11-20
Abstract
No abstract record available.
Inventors
- 👤 Samuel C Earley
- 👤 Norman B Earley
- 👤 Elmore J Sanders
- 👤 Willard C Skareen
- 👤 Ray L Davies
- 👤 Joseph A Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:58
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/02; F01P7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US810032A
Cited
US719225A
Cited
US1730432A
Cited
US2008191A
Cited
FR42239E
Cited
US2225209A
Cited
US2281456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |