Patent US4084992A successfully refreshed from Google Patents.
US4084992A
Expired / Lapsed
US
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Solid propellant with alumina burning rate catalyst
Assignee: ATK Launch Systems LLC
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Filing: 1976-04-22
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Granted: 1978-04-18
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Expires: 1996-04-22
Abstract
Abstract Finely divided aluminum oxide increases the burning rate, reduces the pressure exponent at high pressures and stabilizes the combustion of solid propellant compositions.
Inventors
- 👤 James O. Hightower
- 👤 James W. Hamner
- 👤 Richard L. Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:46
CPC Classifications
C; C06; C06B; C06B23/00; C06B23/007; C06B45/00; C06B45/04; C06B45/06; C06B45/10; Y; Y10; Y10S; Y10S149/00; Y10S149/11
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
41 words
A solid propellant composition which comprises as essential ingredients a binder component, a perchlorate oxidizer component, and from 0.5% to 2% of finely divided aluminum oxide, said aluminum oxide having a total surface area of from 40 to 160 square meters.
Claim 2
Dependent Claim
41 words
A solid propellant composition which comprises as essential ingredients a binder component, a perchlorate oxidizer component, and from 0.5% to 2% of finely divided aluminum oxide, said aluminum oxide having a total surface area of from 40 to 160 square meters.
Claim 3
Dependent Claim
23 words
A solid propellant composition as defined in claim 1 wherein the aluminum oxide has a surface area of 80 square meters per gram.
Claim 4
Dependent Claim
16 words
A solid propellant composition as defined in claim 1 wherein the inorganic perchlorate is ammonium perchlorate.
Claim 5
Dependent Claim
90 words
A process for the preparation of a solid propellant composition having increased burning rate and a reduced pressure exponent, said propellant composition comprising as essential ingredients a binder component, and an inorganic perchlorate oxidizer component, which comprises: a. adding to and mixing with said propellant composition, while said propellant composition is still in an uncured condition, from 0.5% to 2.0% finely divided aluminum oxide, said aluminum oxide having a surface area of from 40 to 160 square meters; and b. curing the aluminum oxide containing propellant mix of step a.
Claim 6
Dependent Claim
90 words
A process for the preparation of a solid propellant composition having increased burning rate and a reduced pressure exponent, said propellant composition comprising as essential ingredients a binder component, and an inorganic perchlorate oxidizer component, which comprises: a. adding to and mixing with said propellant composition, while said propellant composition is still in an uncured condition, from 0.5% to 2.0% finely divided aluminum oxide, said aluminum oxide having a surface area of from 40 to 160 square meters; and b. curing the aluminum oxide containing propellant mix of step a.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |