Patent US3700762A successfully refreshed from Google Patents.
US3700762A
Expired / Lapsed
US
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Propellant grain
Assignee: United States Department of the Navy
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Filing: 1970-05-04
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Granted: 1972-10-24
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Expires: 1990-05-04
Abstract
Abstract A propellant grain is wrapped with glass fiber tape and fitted with epoxy end pieces to inhibit burning in those areas. A fluorocarbon grain is etched with hydrochloric acid and then immersed in lacquer before being wrapped.
Inventors
- 👤 David W Carpenter
- 👤 Charley R Rodgers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:59
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/34; F02K9/346
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
12 words
The process of claim 1 wherein said propellant material comprises a fluorocarbon.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |