US2730154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking fastener having longitudinal spring key detent means
Assignee: Northrop Grumman Corp
•
Filing: 1951-07-23
•
Granted: 1956-01-10
•
Expires: 1971-07-23
Abstract
No abstract record available.
Inventors
- 👤 Cecil W Aspey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:13
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/32; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/948; Y10S411/949
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US365165A
Cited
US815497A
Cited
US1442500A
Cited
US1544132A
Cited
US1718171A
Cited
GB573227A
Cited
US2402813A
Cited
US2471175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |