Patent US4023996A successfully refreshed from Google Patents.
US4023996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moldable compositions comprising polyvinyl nitrate
Assignee: Societe Nationale des Poudres et Explosifs
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Filing: 1976-08-20
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Granted: 1977-05-17
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Expires: 1996-08-20
Abstract
Abstract A mouldable thermoplastic composition comprises (i) polyvinyl nitrate, (ii) nitrocellulose and/or polyvinyl acetate and (iii) 2-nitro-diphenylamine and may be used to form combustible articles such as cartridge cases. Preferably, the composition comprises from 30 to 90% by weight of polyvinyl nitrate based on the total weight of components (i) and (ii). The composition may comprise up to about 30% by weight, based on the weight of components (i) and (ii), of at least one additive selected from cellulose acetate, dinitrotoluene, phthalates, non-volatile esters, heterocyclic ketones, ureas and ABS copolymers.
Inventors
- 👤 Louis J. Leneveu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:18
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/32; C06; C06B; C06B21/00; C06B21/0033; C06B21/0066; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105; C08L; C08L1/00; C08L1/08; C08L1/16; C08L1/18; C08L39/00; Y; Y10; Y10S; Y10S102/00; Y10S102/70
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
Granules of a moldable thermoplastic composition useful for the production of combustible articles which consists essentially of (i) polyvinyl nitrate, (ii) at least one material selected from the group consisting of nitrocellulose and polyvinyl acetate, and (iii) 2-nitrodiphenylamine, the amount of polyvinyl nitrate being between about 30 and about 90% by weight of polyvinyl nitrate based on the total weight of components (i) and (ii), said composition additionally including (iv) an acrylonitrile-butadiene-styrene copolymer, the amount of said acrylonitrile-butadiene-styrene copolymer being greater than zero and up to 30% based on the total weight of components (i) and (ii).
Claim 2
Dependent Claim
97 words
Granules of a moldable thermoplastic composition useful for the production of combustible articles which consists essentially of (i) polyvinyl nitrate, (ii) at least one material selected from the group consisting of nitrocellulose and polyvinyl acetate, and (iii) 2-nitrodiphenylamine, the amount of polyvinyl nitrate being between about 30 and about 90% by weight of polyvinyl nitrate based on the total weight of components (i) and (ii), said composition additionally including (iv) an acrylonitrile-butadiene-styrene copolymer, the amount of said acrylonitrile-butadiene-styrene copolymer being greater than zero and up to 30% based on the total weight of components (i) and (ii).
Claim 3
Dependent Claim
24 words
A composition according to claim 1, in which the amount of 2-nitro-diphenylamine is about 3% of the total weight of components (i) and (ii).
Claim 4
Dependent Claim
38 words
The granules according to claim 1 which contain 30-70 parts by weight of nitrocellulose, 70-30 parts by weight of polyvinyl nitrate and an acrylonitrile-butadiene-styrene copolymer in an amount greater than zero and up to 5 parts by weight.
Claim 5
Dependent Claim
40 words
A mixture useful for the manufacture of combustible articles consisting of the granules according to claim 1 and a porous powder consisting essentially of nitrocellulose, the amount of the porous powder being up to 60% by weight of the mixture.
Claim 6
Dependent Claim
14 words
The granules according to claim 1 wherein the combustible articles are combustible cartridge cases.
Claim 7
Dependent Claim
14 words
The mixture according to claim 4 wherein the combustible articles are combustible cartridge cases.
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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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |