Patent US4062709A successfully refreshed from Google Patents.
US4062709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibited fluorocarbon rocket propellant
Assignee: Individual
•
Filing: 1968-09-25
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Granted: 1977-12-13
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Expires: 1988-09-25
Abstract
Abstract A fluorocarbon bound rocket propellant grain provided with a compatible burn inhibitor on selected areas, particularly the outer surface, which is inexpensive and simple to apply.
Inventors
- 👤 Victor F. Castaneda
- 👤 Homer L. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:34
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/12; C06B21/00; C06B21/0083
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
The method of restricting the burning of fluorocarbon bound propellant grains which comprises spraying the grain with a mixture consisting of 80 parts by weight modified diglycidyl ether of para, para'-isopropylidenediphenol, and 20 parts by weight polymeric amido-amine hardner at a temperature ranging from 100° F. to 150° F., permitting a layer of said mixture to deposit on said grain, and cooling for about one hour at room temperature until said layer is cured.
Claim 2
Independent Claim
74 words
The method of restricting the burning of fluorocarbon bound propellant grains which comprises spraying the grain with a mixture consisting of 80 parts by weight modified diglycidyl ether of para, para'-isopropylidenediphenol, and 20 parts by weight polymeric amido-amine hardner at a temperature ranging from 100° F. to 150° F., permitting a layer of said mixture to deposit on said grain, and cooling for about one hour at room temperature until said layer is cured.
Claim 3
Dependent Claim
46 words
The method of claim 1 wherein said propellant consists essentially of about 15% by weight polytetrafluoroethylene, about 15% by weight of the copolymer of vinylidene fluoride and perfluoropropylene, about 49.5% by weight ammonium perchlorate, about 19.5% by weight aluminum and about 1% by weight sodium fluoride.
Claim 4
Dependent Claim
87 words
The fluorocarbon bound propellant grain having its outer surface covered with a layer of restrictive burning material consisting essentially of a mixture of about 80 parts by weight modified diglycidyl ether of para, para'-isopropylidenediphenol type liquid epoxy resin and about 20 parts by weight of a polymeric amido-amine hardner; said grain comprising about 15% by weight polytetrafluoroethylene, about 15% by weight of the copolymer of vinylidene fluoride and perfluoropropylene, about 49.5% by weight ammonium perchlorate, about 19.5% by weight aluminum and about 1% by weight sodium fluoride.
Claim 5
Dependent Claim
87 words
The fluorocarbon bound propellant grain having its outer surface covered with a layer of restrictive burning material consisting essentially of a mixture of about 80 parts by weight modified diglycidyl ether of para, para'-isopropylidenediphenol type liquid epoxy resin and about 20 parts by weight of a polymeric amido-amine hardner; said grain comprising about 15% by weight polytetrafluoroethylene, about 15% by weight of the copolymer of vinylidene fluoride and perfluoropropylene, about 49.5% by weight ammonium perchlorate, about 19.5% by weight aluminum and about 1% by weight sodium fluoride.
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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) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |