Patent US2398827A successfully refreshed from Google Patents.
US2398827A
Expired / Lapsed
US
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Cowl fastener
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1942-05-02
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Granted: 1946-04-23
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Expires: 1962-05-02
Abstract
No abstract record available.
Inventors
- 👤 Matthew P Graham
- 👤 Venditty Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/32; Y; Y10; Y10S; Y10S411/00; Y10S411/918; Y10S411/924; Y10S411/95; Y10S411/951
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-04-22 | 1949-10-22 | 1950-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-22 | 1953-10-22 | 1954-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-22 | 1957-10-22 | 1958-04-23 | $7700.00 | Window Closed / Lapsed |