Patent US2634414A successfully refreshed from Google Patents.
US2634414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportional control
Assignee: Individual
•
Filing: 1945-08-28
•
Granted: 1953-04-07
•
Expires: 1965-08-28
Abstract
No abstract record available.
Inventors
- 👤 Gordon W Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:28
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/20; F41G7/30; G; G05; G05D; G05D1/00; G05D1/0011
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2171150A
Cited
US1793989A
Cited
US1597416A
Cited
US2176469A
Cited
US2165800A
Cited
US2256336A
Cited
US2397477A
Cited
US2397088A
Cited
US2371415A
Cited
US2454773A
Cited
US2580453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |