US2440790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking separable fastener
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1942-08-29
•
Granted: 1948-05-04
•
Expires: 1962-08-29
Abstract
No abstract record available.
Inventors
- 👤 Venditty Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:36
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2054519A
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US2204829A
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US2174030A
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US2183085A
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US2205863A
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US2252286A
Cited
US2276694A
Cited
US2285661A
Cited
US2309737A
Cited
US2307132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |