US3891482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propellant instability modifier
Assignee: United States Department of the Army
•
Filing: 1974-07-18
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Granted: 1975-06-24
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Expires: 1994-07-18
Abstract
Abstract A composite propellant composition comprising an organic binder; and an oxidizer which has been coated with the following materials: a copolymer of vinylidine and hexafluoropropylene, chlorosulfonated polyethylene, and ethylcellulose.
Inventors
- 👤 Robert S Brown
- 👤 Raymond J Muzzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:30
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/18; C06B45/30; C06B45/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
23 words
IN A PROPELLANT COMPOSITION COMPRISING AN OXIDIZER AND AN ORGANIC BINDER COMPONENT, THE IMPROVEMENT WHEREIN THE OXIDIZER PARTICLE HAS BEEN COATED WITH ETHYLCELLULOSE.
Claim 2
Dependent Claim
23 words
IN A PROPELLANT COMPOSITION COMPRISING AN OXIDIZER AND AN ORGANIC BINDER COMPONENT, THE IMPROVEMENT WHEREIN THE OXIDIZER PARTICLE HAS BEEN COATED WITH ETHYLCELLULOSE.
Claim 3
Dependent Claim
13 words
A composition in accordance with claim 1 wherein the oxidizer is ammonium perchlorate.
Claim 4
Dependent Claim
14 words
A composition in accordance with claim 2 wherein the binder is a carboxy-terminated polybutadiene.
Claim 5
Dependent Claim
28 words
A composition in accordance with claim 3 that contains the materials in the approximate weight ratio of 78 parts of ammonium perchlorate to 22 parts of carboxy-terminated polybutadiene.
Claim 6
Independent Claim
28 words
A method of inhibiting the combustion instability characteristic of a non-aluminized propellant having an oxidizer and organic binder component; comprising the coating of the oxidizer particles with ethylcellulose.
Claim 7
Independent Claim
28 words
A method of inhibiting the combustion instability characteristic of a non-aluminized propellant having an oxidizer and organic binder component; comprising the coating of the oxidizer particles with ethylcellulose.
Claim 8
Dependent Claim
13 words
A method in accordance with claim 5 wherein the oxidizer is ammonium perchlorate.
Claim 9
Dependent Claim
14 words
A method in accordance with claim 5 wherein the binder is a carboxy-terminated polybutadiene.
Claim 10
Dependent Claim
24 words
A method in accordance with claim 7 containing the approximate weight ratio of 78 parts of ammonium perchlorate to 22 parts of carboxy-terminated polybutadiene.
References Cited (Backward Citations)
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US3190776A
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US3441455A
Cited
US3332812A
Cited
US3551222A
Cited
US3539377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |