Patent US3853645A successfully refreshed from Google Patents.
US3853645A
Expired / Lapsed
US
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Composite propellant containing polytetrafluoroethylene powder and butyl or ethylene-propylene rubber
Assignee: United States Department of the Navy
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Filing: 1970-10-30
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Granted: 1974-12-10
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Expires: 1990-10-30
Abstract
Abstract A process for the preparation of propellant molding powders having good ingredient quality control and good composition homogeneity comprising Teflon powder, butyl or ethylene-propylene rubber binder and an inorganic oxidizer. Metal fuels such as aluminum were also included, as were burning rate modifiers. The process comprises forming a homogeneous binder solution, adding the propellant ingredients and mixing to form a paste, extruding the paste through small cross-sectional orifices, blowing warm air or inert gas around the strands extruded from the orifices and collecting the strands by appropriate means.
Inventors
- 👤 M Kaufman
- 👤 E Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:20
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
51 words
A PROPELLANT MOLDING POWDER COMPRISING: FROM ABOUT 70 TO 90 PERCENT BY WEIGHT INORGANIC OXIDIZER; UP TO ABOUT 20 PERCENT BY WEIGHT POLYTETRAFLHOROETHYLENE; AND FROM ABOUT 5 TO ABOUT 15 PERCENT BY WEIGHT OF A SYNTHETIC RUBBER SELECTED FROM THE GROUP CONSISTING OF BUTYL RUBBER, ETHYLENE PROPGLENE RUBBER AND MIXTURES THEREOFF.
Claim 2
Dependent Claim
51 words
A PROPELLANT MOLDING POWDER COMPRISING: FROM ABOUT 70 TO 90 PERCENT BY WEIGHT INORGANIC OXIDIZER; UP TO ABOUT 20 PERCENT BY WEIGHT POLYTETRAFLHOROETHYLENE; AND FROM ABOUT 5 TO ABOUT 15 PERCENT BY WEIGHT OF A SYNTHETIC RUBBER SELECTED FROM THE GROUP CONSISTING OF BUTYL RUBBER, ETHYLENE PROPGLENE RUBBER AND MIXTURES THEREOFF.
Claim 3
Dependent Claim
13 words
The powder in accordance with claim 1 wherein the oxidizer is ammonium perchlorate.
Claim 4
Dependent Claim
18 words
The powder in accordance with claim 1 containing additionally up to about 20 percent by weight metallic fuel.
Claim 5
Dependent Claim
17 words
The powder in accordance with claim 3 containing additionally up to about 3 percent burning rate modifier.
Claim 6
Dependent Claim
12 words
The powder in accordance with claim 3 wherein the fuel is aluminum.
Claim 7
Dependent Claim
13 words
The powder in accordance with claim 5 wherein the oxidizer is ammonium perchlorate.
Claim 8
Dependent Claim
25 words
The powder in accordance with claim 4 wherein the oxidizer is ammonium perchlorate, the fuel is aluminum and the burning rate modifier is copper chromate.
References Cited (Backward Citations)
US3513043A
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US3395055A
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US3377955A
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US3257802A
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US3476622A
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US3577289A
Cited
US3586552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |