Patent US4798637A successfully refreshed from Google Patents.
US4798637A
Expired / Lapsed
US
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Composite solid propellants containing bitetrazoles
Assignee: ATK Launch Systems LLC
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Filing: 1983-03-03
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Granted: 1989-01-17
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Expires: 2003-03-03
Abstract
Abstract Composite solid propellants are provided containing, in an amount effective to reduce the burning rate of the propellant, at least one bitetrazole compound.
Inventors
- 👤 Roger R. Hendrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:07
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B23/00; C06B23/007; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/113
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
In a composite solid propellant containing ammonium perchlorate as oxidizer, the improvement comprising at least one bitetrazole compound in an amount effective to reduce the burning rate of said propellant.
Claim 2
Dependent Claim
30 words
In a composite solid propellant containing ammonium perchlorate as oxidizer, the improvement comprising at least one bitetrazole compound in an amount effective to reduce the burning rate of said propellant.
Claim 3
Dependent Claim
11 words
The propellant of claim 1 wherein the bitetrazole compound is bitetrazole.
Claim 4
Dependent Claim
15 words
The propellant of claim 1 wherein the bitetrazole compound is the diammonium salt of bitetrazole.
Claim 5
Dependent Claim
29 words
The propellant of claim 1 wherein the bitetrazole compound is employed in an amount from about 0.5% to about 5.0% by weight based on the weight of the propellant.
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) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |