US2533436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking wrench
Assignee: ROLAND B COLLISON
•
Filing: 1946-05-29
•
Granted: 1950-12-12
•
Expires: 1966-05-29
Abstract
No abstract record available.
Inventors
- 👤 John S Collison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:56
CPC Classifications
B; B25; B25B; B25B7/00; B25B7/12; B25B7/123; B25B13/00; B25B13/10; B25B13/28; B25B13/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |