US2521378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking nail
Assignee: Elastic Stop Nut Corp
•
Filing: 1948-12-08
•
Granted: 1950-09-05
•
Expires: 1968-12-08
Abstract
No abstract record available.
Inventors
- 👤 Andrew G Kolessar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:36
CPC Classifications
F; F16; F16B; F16B15/00; F16B15/04; Y; Y10; Y10S; Y10S411/00; Y10S411/923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US451859A
Cited
US1082540A
Cited
US1056190A
Cited
US1300609A
Cited
GB192492A
Cited
US2196521A
Cited
US2222338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |