US2850977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self energized stabilizing control
Assignee: Individual
•
Filing: 1956-03-13
•
Granted: 1958-09-09
•
Expires: 1976-03-13
Abstract
No abstract record available.
Inventors
- 👤 Richard J Pollak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:28
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/60; F42B10/66; F42B10/665; F02; F02K; F02K9/00; F02K9/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2165800A
Cited
GB579816A
Cited
US2322782A
Cited
FR996656A
Cited
US2621871A
Cited
US2644296A
Cited
US2654552A
Cited
FR1007694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |