US2580745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking nut
Assignee: RICHARD W LUCE
•
Filing: 1947-01-18
•
Granted: 1952-01-01
•
Expires: 1967-01-18
Abstract
No abstract record available.
Inventors
- 👤 Henry O Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:48
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/38; F16B39/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US370559A
Cited
US1903921A
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FR810417A
Cited
GB545484A
Cited
US2299085A
Cited
US2381110A
Cited
US2349513A
Cited
US2333290A
Cited
US2381111A
Cited
GB580325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |