US2679879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking nut
Assignee: Individual
•
Filing: 1946-03-01
•
Granted: 1954-06-01
•
Expires: 1966-03-01
Abstract
No abstract record available.
Inventors
- 👤 Henry O Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:12
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/64; B21K1/70; B21K1/707; F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/284; F16B39/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US426185A
Cited
US1083217A
Cited
US1903921A
Cited
US1903922A
Cited
US2299085A
Cited
USRE22243E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-31 | 1957-11-30 | 1958-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-31 | 1961-11-30 | 1962-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-31 | 1965-11-30 | 1966-06-01 | $7700.00 | Window Closed / Lapsed |