US2844938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel pressuring system for supersonic ram-jet
Assignee: Individual
•
Filing: 1952-04-11
•
Granted: 1958-07-29
•
Expires: 1972-04-11
Abstract
No abstract record available.
Inventors
- 👤 John P Longwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:28
CPC Classifications
F; F02; F02K; F02K7/00; F02K7/10; F02K9/00; F02K9/42; F02K9/44; F02K9/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2395113A
Cited
US2394852A
Cited
US2331117A
Cited
US2404428A
Cited
US2505798A
Cited
US2648196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |