Patent US3492177A successfully refreshed from Google Patents.
US3492177A
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Pseudo-plastic rocket propellants containing hydrazines with hydroxypropyl cellulose ether
Assignee: FMC Corp
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Filing: 1964-08-26
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Granted: 1970-01-27
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Expires: 1984-08-26
Abstract
No abstract record available.
Inventors
- 👤 Eric Rau
- 👤 Daniel Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:55
CPC Classifications
C; C06; C06B; C06B23/00; C06B23/001; C06B47/00; C06B47/02; C06B47/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PSEUDO-PLASTIC ROCKET PROPELLANT COMPRISING 40 TO 80 PERCENT BY WEIGHT OF HYDRAZINE AND 60 TO 20 PERCENT BY WEIGHT OF UNSYMMETRICAL DIMETHYLHYDRAZINE, AND, AS A GELLING AGENT THEREFOR, 0.5 TO 5.0%, BASED UPON THE TOTAL WEIGHT HYDRAZINE AND UNSYMMETRICAL DIMETHYLDRAZINE, OF A HYDROXYPROPYL CELLULOSE ETHER HAVING AN MS SUBSTITUTION VALUE OF 2.5 TO 7.
Claim 2
Dependent Claim
55 words
A PSEUDO-PLASTIC ROCKET PROPELLANT COMPRISING 40 TO 80 PERCENT BY WEIGHT OF HYDRAZINE AND 60 TO 20 PERCENT BY WEIGHT OF UNSYMMETRICAL DIMETHYLHYDRAZINE, AND, AS A GELLING AGENT THEREFOR, 0.5 TO 5.0%, BASED UPON THE TOTAL WEIGHT HYDRAZINE AND UNSYMMETRICAL DIMETHYLDRAZINE, OF A HYDROXYPROPYL CELLULOSE ETHER HAVING AN MS SUBSTITUTION VALUE OF 2.5 TO 7.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |