Patent US4535607A successfully refreshed from Google Patents.
US2983331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inverted flight reservoir
Assignee: North American Aviation Corp
•
Filing: 1957-07-08
•
Granted: 1961-05-09
•
Expires: 1977-07-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles W Helsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:37
CPC Classifications
F; F16; F16N; F16N39/00; F16N39/002; B; B01; B01D; B01D19/00; B01D19/0042; B01D19/0052; B01D19/0057; B64; B64D; B64D37/00; B64D37/34; F01; F01M; F01M11/00; F01M11/06; F01M11/062; F01M11/065; F01M11/067; F05; F05D; F05D2260/00; F05D2260/60; F05D2260/609
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |