Patent US3753813A successfully refreshed from Google Patents.
US3753813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dense propellant containing fluoropolymers and heavy metal component
Assignee: United States Department of the Navy
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Filing: 1971-11-24
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Granted: 1973-08-21
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Expires: 1991-11-24
Abstract
Abstract A dense propellant composition for use in the first stage rocket engine of a multistaged missile system. The composition comprises Viton A, Teflon, mercuric oxide, and uranium-aluminum alloy.
Inventors
- 👤 A Dierolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:52
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B33/00; C06B33/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
The composition in accordance with claim 1 wherein the copolymer of vinylidene fluoride and hexafluoropropylene consists of 9.3 percent by weight; the polytetrafluoroethylene consists of 4.7 percent by weight; the mercuric oxide consists of 67 percent by weight; and the uranium-aluminum consists of 19 percent by weight.
Claim 2
Dependent Claim
21 words
The composition in accordance with claim 2 wherein the uranium-aluminum alloy has a mean particle size ranging from 5 -70 microns.
References Cited (Backward Citations)
US3513043A
Cited
US3198678A
Cited
US3640070A
Cited
US3317362A
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US3463682A
Cited
US3671343A
Cited
US3634153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |