US2809080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-extrusion device for annular seals
Assignee: North American Aviation Corp
•
Filing: 1953-11-23
•
Granted: 1957-10-08
•
Expires: 1973-11-23
Abstract
No abstract record available.
Inventors
- 👤 Frank C Mittell
- 👤 Robert J Culleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:26
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/166; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1130615A
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US1229258A
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US1819890A
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US1958313A
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US2349170A
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US2456356A
Cited
US2749193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |