US4632715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low burn rate motor propellant
Assignee: United States Department of the Navy
•
Filing: 1985-12-10
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Granted: 1986-12-30
•
Expires: 2005-12-10
Abstract
Abstract A low burn rate motor propellant containing hydroxyl terminated polybutadiene, HMX and hexanedioldimerate polymer.
Inventors
- 👤 Donald D. Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:54
CPC Classifications
C; C06; C06B; C06B25/00; C06B25/34; C06B45/00; C06B45/04; C06B45/06; C06B45/10; Y; Y10; Y10S; Y10S149/00; Y10S149/11; Y10S149/111
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
16 words
A low burn rate motor propellant comprised of hexanedioldimerate polymer, hydroxyl terminated polybutadiene and cyclotetramethylene tetranitramine.
Claim 2
Dependent Claim
16 words
A low burn rate motor propellant comprised of hexanedioldimerate polymer, hydroxyl terminated polybutadiene and cyclotetramethylene tetranitramine.
Claim 3
Dependent Claim
22 words
The propellant of claim 1 wherein said hexanedioldimerate and said hydroxyl terminated polybutadiene are present in a 1 to 1 weight ratio.
Claim 4
Dependent Claim
22 words
The propellant of claim 1 wherein the composition by weight is about 85.3% cyclotetramethylene tetranitramine and about 14.7% hexanedioldimerate polymer/hydroxyl terminated polybutadiene.
Claim 5
Dependent Claim
10 words
The propellant of claim 1 which further comprises carbon black.
Claim 6
Dependent Claim
25 words
The propellant of claim 4 wherein the composition by weight is about 85.3% cyclotetramethylene tetranitramine, about 14.65% hexanedioldimerate/hydroxyl terminated polybutadiene and about 0.05% carbon black.
Claim 7
Dependent Claim
43 words
The propellant of claim 1 wherein said HMX is a mixture of fine and coarse cyclotetramethylene tetranitramine particles, wherein said fine particles have an average mean diameter of about 13μ and said coarse particles have an average mean particle diameter of about 150μ.
Claim 8
Dependent Claim
21 words
The propellant of claim 6 wherein the ratio of coarse to fine particles is within the range of 60:40 to 75:25.
Claim 9
Dependent Claim
16 words
The propellant of claim 7 wherein the ratio of coarse to fine particles is about 70:30.
References Cited (Backward Citations)
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Cited
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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) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |