US2454440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wind electric governor
Assignee: Individual
•
Filing: 1944-12-18
•
Granted: 1948-11-23
•
Expires: 1964-12-18
Abstract
No abstract record available.
Inventors
- 👤 Foulston Roy Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:01
CPC Classifications
F; F03; F03D; F03D7/00; F03D7/02; F03D7/0244; F03D7/0252; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1287116A
Cited
US1782280A
Cited
US1793321A
Cited
US2025561A
Cited
US2139954A
Cited
US2148921A
Cited
US2215456A
Cited
US2317778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-23 | 1952-05-24 | 1952-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-23 | 1956-05-24 | 1956-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-23 | 1960-05-24 | 1960-11-23 | $7700.00 | Window Closed / Lapsed |