Patent US3221494A successfully refreshed from Google Patents.
US3221494A
Expired / Lapsed
US
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Compositions, processes, and apparatus for the improvement of bi-propellant fuels
Assignee: North American Aviation Corp
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Filing: 1961-02-13
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Granted: 1965-12-07
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Expires: 1981-02-13
Abstract
No abstract record available.
Inventors
- 👤 Chu Ju Chin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:58
CPC Classifications
C; C06; C06B; C06B23/00; C06B23/009; C06D; C06D5/00; C06D5/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A LIQUID BI-PROPOLLANT COMPOSITION FOR ROCKETS THAT COMPRISES THE COMPONENTS HYDRAZINE, PENTABOANE, AND A SURFACE ACTIVE AGENT FOR EACH OF SAID HYDRAZINE AND SAID PENTABORANE, EACH OF SAID SURFACE ACTIVE AGENTS BEING PRESENT IN AN AMOUNT BY WEIGHT OF EACH OF SAID COMPONENTS WITHIN THE RANGE OF 0.1 PERCENT TO 1.0 PERCENT.
Claim 2
Dependent Claim
52 words
A LIQUID BI-PROPOLLANT COMPOSITION FOR ROCKETS THAT COMPRISES THE COMPONENTS HYDRAZINE, PENTABOANE, AND A SURFACE ACTIVE AGENT FOR EACH OF SAID HYDRAZINE AND SAID PENTABORANE, EACH OF SAID SURFACE ACTIVE AGENTS BEING PRESENT IN AN AMOUNT BY WEIGHT OF EACH OF SAID COMPONENTS WITHIN THE RANGE OF 0.1 PERCENT TO 1.0 PERCENT.
References Cited (Backward Citations)
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Cited
US2737522A
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US2900788A
Cited
US2939278A
Cited
US2901886A
Cited
US2979891A
Cited
US3000179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |