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US2520259A
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Self-locking nut and washer
Assignee: Individual
•
Filing: 1945-03-28
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Granted: 1950-08-29
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Expires: 1965-03-28
Abstract
No abstract record available.
Inventors
- 👤 Edwin W Pummill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:26
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/24; F16B39/26; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/935; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/4979
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US256767A
Cited
US642375A
Cited
US1945005A
Cited
US1875930A
Cited
US1928769A
Cited
US2285080A
Cited
US2380994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |