US3686868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocket motors
Assignee: Individual
•
Filing: 1968-12-19
•
Granted: 1972-08-29
•
Expires: 1988-12-19
Abstract
Abstract An elastomer-containing compound suitable for use in the lining of rocket motor cases comprising 100 parts by weight elastomer and, inter alia, 20-80 parts by weight of at least one metal halide having a boiling point above 500* C and developing a significant vapor pressure between 500 and 1,200* C. The metal halide is typically lead chloride.
Inventors
- 👤 Michael John Chase
- 👤 Derek Anthony Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:40
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/34; F02K9/346; Y; Y10; Y10S; Y10S102/00; Y10S102/704; Y10S60/00; Y10S60/909
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
15 words
A compound according to claim 1 containing 20-60 parts by weight of said lead chloride.
Claim 2
Dependent Claim
15 words
A compound according to claim 2 containing 50 parts by weight of said lead chloride.
Claim 3
Dependent Claim
45 words
A compound according to claim 1 wherein said 100 parts by weight of elastomer consists of 75-100 parts by weight of a terpolymer of ethylene and propylene and a diene containing unsaturated linkages of unequal reactivity and 25-0 parts by weight of a chlorosulphonated polyethylene.
Claim 4
Dependent Claim
22 words
A compound according to claim 4 wherein the terpolymer of ethylene and propylene is a terpolymer of ethylene and propylene with dicyclopentadiene.
Claim 5
Dependent Claim
22 words
A compound according to claim 4 wherein the terpolymer of ethylene and propylene is a terpolymer of ethylene and propylene with methyl-tetra-hydro-indene.
Claim 6
Dependent Claim
24 words
A compound according to claim 1 wherein said 40-100 parts by weight of filler material is about 60 parts by weight of silica powder.
References Cited (Backward Citations)
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US3347047A
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US3403626A
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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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |