Patent US1727879A successfully refreshed from Google Patents.
Patent US2789505A successfully refreshed from Google Patents.
US2789505A
Expired / Lapsed
US
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Liquid propellent rocket
Assignee: North American Aviation Corp
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Filing: 1951-08-23
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Granted: 1957-04-23
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Expires: 1971-08-23
Abstract
No abstract record available.
Inventors
- 👤 James M Cumming
- 👤 George P Sutton
- 👤 Vernon R Vorwerk
- 👤 Darell B Harmon
- 👤 Charles A Villiers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:33
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/60; F02K9/44; F02K9/95
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
IN A LIQUID PROPELLED ROCKET MISSILE, A ROCKET MOTOR, A MAIN FUEL TANK RIGID STRUCTURAL WALLS, A SECOND PROPELLENT TANK WITHIN SAID MAIN TANK HAVING FLEXIBLE WALLS, CONDUIT MEANS CONNECTING SAID TANKS TO SAID ROCKET MOTOR, AND MEANS FOR PRESSURIZING SAID MAIN TANK TO THEREBY PRESSURIZE SAID SECOND TANK TO FORCE PROPELLANTS CONTAINED IN SAID TANKS INTO SAID ROCKET MOTOR.
References Cited (Backward Citations)
US2419866A
Cited
US2402826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |