US3833432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium azide gas generating solid propellant with fluorocarbon binder
Assignee: United States Department of the Navy
•
Filing: 1970-02-11
•
Granted: 1974-09-03
•
Expires: 1990-02-11
Abstract
Abstract Gas generating solid propellant compositions which utilize sodium azide as a nitrogen source and are further comprised of a fluorocarbon binder material and a combustion catalyst of finely divided colloidal silicon dioxide and/or finely divided carbon black.
Inventors
- 👤 M Chang
- 👤 B Moy
- 👤 Kenzie G Mac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:10
CPC Classifications
C; C06; C06B; C06B35/00; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06D; C06D5/00; C06D5/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
32 words
The gas generating solid propellant composition of claim 1 wherein said finely divided colloidal silicon dioxide is further characterized by having a minimum surface area of about 175 square meters per gram.
Claim 2
Dependent Claim
20 words
The gas generating solid propellant composition of claim 1 wherein said fluorocarbon binder material is a polymeric fully fluorinated fluorocarbon.
Claim 3
Dependent Claim
20 words
The gas generating solid propellant composition of claim 1 wherein said fluorocarbon binder material is a polymeric partially fluorinated fluorocarbon.
Claim 4
Dependent Claim
23 words
The gas generating solid propellant composition of claim 1 which further includes a metal selected from the group consisting of magnesium and aluminum.
Claim 5
Dependent Claim
68 words
The gas generating solid propellant composition of claim 1 wherein said sodium azide is present in an amount within the range of from about 50 to about 75 weight percent, said fluorocarbon binder material is present in an amount within the range of from about 25 to about 40 percent by weight and said combustion catalyst is present in an amount up to about 10 percent by weight.
Claim 6
Dependent Claim
24 words
The gas generating solid propellant composition of claim 1 wherein said sodium azide and said fluorocarbon binder material are present in about stoichiometric quantities.
Claim 7
Dependent Claim
29 words
The gas generating solid propellant composition of claim 1 wherein said fluorocarbon material is selected from the group consisting of polytetrafluoroethylene, and a copolymer of vinylidene fluoride and perfluoropropylene.
Claim 8
Dependent Claim
17 words
The gas generating solid propellant composition of claim 3 wherein said polymeric fully fluorinated fluorocarbon is polytetrafluoroethylene.
Claim 9
Dependent Claim
23 words
The gas generating solid propellant composition of claim 4 wherein said polymeric partially fluorinated fluorocarbon is a copolymer of vinylidene fluoride and hexafluoropropylene.
Claim 10
Dependent Claim
20 words
The gas generating solid propellant composition of claim 4 wherein said polymeric partially fluorinated fluorocarbon is a homopolymer of chlorotrifluoroethylene.
Claim 11
Dependent Claim
23 words
The gas generating solid propellant composition of claim 4 wherein said polymeric partially fluorinated fluorocarbon is a copolymer of vinylidene fluoride and chlorotrifluoroethylene.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |