Patent US3940368A successfully refreshed from Google Patents.
US3940368A
Expired / Lapsed
US
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Acrylonitrile copolymers suitable for making flame-resisting fibers
Assignee: Societa Italiana Resine SpA SIR
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Filing: 1974-11-19
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Granted: 1976-02-24
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Expires: 1994-11-19
Abstract
Abstract A copolymer suitable for making self-extinguishing fibers, containing at least 50 wt.% acrylonitrile, from 2 to 30 wt.% vinyl or vinylidene chloride, from 0 to 10 wt.% of a neutral, ethylenically unsaturated, non-halogenated monomer and from 2 to 40 wt.% of alpha-bromoacrylonitrile.
Inventors
- 👤 Luciano Console
- 👤 Ferdinando Bencini
- 👤 Enzo Chiellini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:21
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
46 words
A copolymer suitable for making self-extinguishing fibers, consisting essentially of at least 50 wt.% of acrylonitrile, from 2 to 30 wt.% of vinyl or vinylidene chloride, from 0 to 10 wt.% of a neutral, ethylenically unsaturated, non-halogenated monomer and from 2 to 40 wt.% of alpha-bromoacrylonitrile.
Claim 2
Dependent Claim
46 words
A copolymer suitable for making self-extinguishing fibers, consisting essentially of at least 50 wt.% of acrylonitrile, from 2 to 30 wt.% of vinyl or vinylidene chloride, from 0 to 10 wt.% of a neutral, ethylenically unsaturated, non-halogenated monomer and from 2 to 40 wt.% of alpha-bromoacrylonitrile.
Claim 3
Dependent Claim
46 words
A copolymer suitable for making self-extinguishing fibers, consisting essentially of at least 70 wt.% of acrylonitrile, from 10 to 25 wt.% of vinyl or vinylidene chloride, from 0 to 5 wt.% of a neutral, ethylenically unsaturated, non-halogenated monomer and from 5 to 20 wt.% of alpha-bromoacrylonitrile.
Claim 4
Dependent Claim
46 words
A copolymer suitable for making self-extinguishing fibers, consisting essentially of at least 70 wt.% of acrylonitrile, from 10 to 25 wt.% of vinyl or vinylidene chloride, from 0 to 5 wt.% of a neutral, ethylenically unsaturated, non-halogenated monomer and from 5 to 20 wt.% of alpha-bromoacrylonitrile.
Claim 5
Dependent Claim
56 words
A copolymer suitable for making self-extinguishing fibers, consisting essentially of at least 50 wt.% acrylonitrile, from 2 to 30 wt.% vinyl or vinylidene chloride, from 0 to 10 wt.% of a neutral, ethylenically unsaturated, non-halogenated monomer, from 2 to 40 wt.% of alpha-bromoacrylonitrile and from 0.1 to 3 wt.% of a copolymerized monomer carrying sulphonic groups.
Claim 6
Dependent Claim
56 words
A copolymer suitable for making self-extinguishing fibers, consisting essentially of at least 50 wt.% acrylonitrile, from 2 to 30 wt.% vinyl or vinylidene chloride, from 0 to 10 wt.% of a neutral, ethylenically unsaturated, non-halogenated monomer, from 2 to 40 wt.% of alpha-bromoacrylonitrile and from 0.1 to 3 wt.% of a copolymerized monomer carrying sulphonic groups.
Claim 7
Dependent Claim
55 words
A copolymer suitable for making self-extinguishing fibers, consisting essentially of at least 70 wt.% acrylonitrile, from 10 to 25 wt.% vinyl or vinylidene chloride, from 0 to 5 wt.% of a neutral, ethylenically unsaturated, non-halogenated monomer, from 5 to 20 wt.% alpha-bromoacrylonitrile and from 0.1 to 3 wt.% of a copolymerized monomer carrying sulphonic groups.
Claim 8
Dependent Claim
55 words
A copolymer suitable for making self-extinguishing fibers, consisting essentially of at least 70 wt.% acrylonitrile, from 10 to 25 wt.% vinyl or vinylidene chloride, from 0 to 5 wt.% of a neutral, ethylenically unsaturated, non-halogenated monomer, from 5 to 20 wt.% alpha-bromoacrylonitrile and from 0.1 to 3 wt.% of a copolymerized monomer carrying sulphonic groups.
Claim 9
Dependent Claim
32 words
The copolymer of claim 1, wherein the said neutral monomer is selected in the group consisting of styrene, alpha-methylstyrene, vinyl methyl ether, vinyl methyl ketone, methyl acrylate, methyl methacrylate and vinyl acetate.
Claim 10
Dependent Claim
32 words
The copolymer of claim 2, wherein the said neutral monomer is selected in the group consisting of styrene, alpha-methylstyrene, vinyl methyl ether, vinyl methyl ketone, methyl acrylate, methyl methacrylate and vinyl acetate.
Claim 11
Dependent Claim
32 words
The copolymer of claim 3, wherein the said neutral monomer is selected in the group consisting of styrene, alpha-methylstyrene, vinyl methyl ether, vinyl methyl ketone, methyl acrylate, methyl methacrylate and vinyl acetate.
Claim 12
Dependent Claim
36 words
The copolymer of claim 3, wherein the monomer carrying sulphonic groups is selected from the group consisting of methallyl sulphonic acid, styrene sulphonic acid, methallyl oxyethyl sulphonic acid and sodium and potassium salts of these acids.
Claim 13
Dependent Claim
36 words
The copolymer of claim 3, wherein the monomer carrying sulphonic groups is selected from the group consisting of methallyl sulphonic acid, styrene sulphonic acid, methallyl oxyethyl sulphonic acid and sodium and potassium salts of these acids.
Claim 14
Dependent Claim
33 words
The copolymer of claim 4, wherein the said neutral monomer is selected in the group consisting of styrene, alpha-methyl styrene, vinyl methyl ether, vinyl methyl ketone, methyl acrylate, methyl methacrylate and vinyl acetate.
References Cited (Backward Citations)
US3379699A
Cited
US3426104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |