US2782877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring controlling unit
Assignee: Individual
•
Filing: 1953-05-01
•
Granted: 1957-02-26
•
Expires: 1973-05-01
Abstract
No abstract record available.
Inventors
- 👤 George W Crabtree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:18
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/34; F16F9/348; F16F9/3485; F16F9/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR654039A
Cited
US2106886A
Cited
FR1008843A
Cited
GB681961A
Cited
US2630193A
Cited
US2657770A
Cited
US2698675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |