US2539887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking bolt
Assignee: Nylok LLC
•
Filing: 1949-01-26
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Granted: 1951-01-30
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Expires: 1969-01-26
Abstract
No abstract record available.
Inventors
- 👤 Edmund R Boots
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:31
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/34; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/947
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US990732A
Cited
GB504853A
Cited
GB496638A
Cited
US2390759A
Cited
US2421105A
Cited
US2398838A
Cited
US2462603A
Cited
US2520121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |