Patent US3853646A successfully refreshed from Google Patents.
US3853646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smokeless composite propellants containing carboxy - or hydroxy - terminated polymers and a nitro-organic oxidizer
Assignee: Boeing North American Inc
•
Filing: 1967-04-05
•
Granted: 1974-12-10
•
Expires: 1987-04-05
Abstract
Abstract Smokeless rocket propellant compositions comprising from 5 to 40% hydroxy and carboxy terminated polymers, from 60 to 90 percent oxidizer, either bis-trinitroethyl urea or tetrakistrinitroethyl orthocarbonate, and from 0 to 5 percent a crosslinking agent selected from the group consisting of triols, tricarboxylic acids, triepoxides, and triisocyanates. The positions may also contain from 0 to 40 percent of a nitroplasticizer.
Inventors
- 👤 M Frankel
- 👤 D Golding
- 👤 B Minnich
- 👤 V Haury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:54
CPC Classifications
C; C06; C06B; C06B43/00; C06B45/00; C06B45/04; C06B45/06; C06B45/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
SMOKELESS ROCKET PROPELLANT COMPOSITIONS COMPRISING: FROM 5 TO 40 PERCENT CURED MATRIX POLYMERS HAVING AAN FROM 5 TO 40 PERCENT CURED MATRIX POLYMERS HAVING AB OXYGEN TO CARBON ATOM RATION FROM FROM ABOUT 0 TO 0.5 HYDROXY TERMINATED POLYESTERS THAT HAVE BEEN CURED BY ISOCYANATES; HYDROXY TERMINATED POLYETHERS THAT HAVE BEEN CURED BY ISOCYANATES; HYDROXY TERMINATED POLYBUTADIENES THAT HAVE BEEN CURED BY ISOCYANATES; CARBOXY TERMINATED POLYESTERS THAT HAVE BEEN CURED BY EPOXIDES; ABD CARBOXY TERMINATED POLYBUTADIENES THAT HAVE BEEN CURED BY EPOXIDES; FROM 0.3 TO 5 PERCENT OF A COMPOUND SELECTED FROM TJE GROUP CONSISTING OF TRIOLS, TRICARBOXYLIC ACIDS, TRIEPOXIDES AND TRIISOCYANATES; AND FROM 60 TO 90 PERCENT OF AN OXIDIZER SELECTED FROM THE GROUP CONSISTING OF BIS-TRINITROETHYL UREA, TETRAKISTRINITROETHYL ORTHOCARBONATE, AND COMBINATIONS THEREOF.
Claim 2
Dependent Claim
124 words
SMOKELESS ROCKET PROPELLANT COMPOSITIONS COMPRISING: FROM 5 TO 40 PERCENT CURED MATRIX POLYMERS HAVING AAN FROM 5 TO 40 PERCENT CURED MATRIX POLYMERS HAVING AB OXYGEN TO CARBON ATOM RATION FROM FROM ABOUT 0 TO 0.5 HYDROXY TERMINATED POLYESTERS THAT HAVE BEEN CURED BY ISOCYANATES; HYDROXY TERMINATED POLYETHERS THAT HAVE BEEN CURED BY ISOCYANATES; HYDROXY TERMINATED POLYBUTADIENES THAT HAVE BEEN CURED BY ISOCYANATES; CARBOXY TERMINATED POLYESTERS THAT HAVE BEEN CURED BY EPOXIDES; ABD CARBOXY TERMINATED POLYBUTADIENES THAT HAVE BEEN CURED BY EPOXIDES; FROM 0.3 TO 5 PERCENT OF A COMPOUND SELECTED FROM TJE GROUP CONSISTING OF TRIOLS, TRICARBOXYLIC ACIDS, TRIEPOXIDES AND TRIISOCYANATES; AND FROM 60 TO 90 PERCENT OF AN OXIDIZER SELECTED FROM THE GROUP CONSISTING OF BIS-TRINITROETHYL UREA, TETRAKISTRINITROETHYL ORTHOCARBONATE, AND COMBINATIONS THEREOF.
Claim 3
Dependent Claim
36 words
The compositions of claim 1 additionally comprising from 0 to 40 percent of a nitroplasticizer selected from the group consisting of bisdinitropropyl acetal, bis-dinitropropyl formal, trinitrobutyronitrile, similar nitro substituted esters, ethers and nitriles, and mixtures thereof.
Claim 4
Dependent Claim
15 words
The compositions of claim 2 wherein the cured matrix polymer is polyurethane cured by polyisocyanate.
References Cited (Backward Citations)
US3097239A
Cited
US3306939A
Cited
US3087844A
Cited
US3155552A
Cited
US3257248A
Cited
US3305523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |