US4331783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel block copolymers including acrylonitrile sequences and glutarimide units and processes for preparing same
Assignee: SKY POLYMERS PL A OF LP
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Filing: 1980-09-17
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Granted: 1982-05-25
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Expires: 2000-09-17
Abstract
Abstract There is disclosed block copolymers having acrylonitrile sequences and sequences of glutarimide units of a molecular weight of form about 10,000 to about 2,000,000 where the acrylonitrile sequences and sequences including glutarimide units are of a molecular weight of at least about 400 with the number of sequences being at least about 2 and preferably 5 and higher.
Inventors
- 👤 Vladimir A. Stoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:57
CPC Classifications
C; C08; C08F; C08F293/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
A novel block copolymer of a molecular weight of from 10,000 to 2,000,000 comprised of acrylonitrile sequences and sequences comprised of a major portion of glutarimide units said acrylonitrile sequences having a molecular weight of at least 400, said sequence of said major portion of glutarimide units having a molecular weight of at least 400.
Claim 2
Dependent Claim
55 words
A novel block copolymer of a molecular weight of from 10,000 to 2,000,000 comprised of acrylonitrile sequences and sequences comprised of a major portion of glutarimide units said acrylonitrile sequences having a molecular weight of at least 400, said sequence of said major portion of glutarimide units having a molecular weight of at least 400.
Claim 3
Dependent Claim
17 words
The block copolymers as defined in claim 1 wherein said molecular weight is from 40,000 to 550,000.
Claim 4
Dependent Claim
36 words
The block copolymer as defined in claims 1 or 2 wherein said molecular weight of said acrylonitrile sequences is preferably at least 600 and said molecular weight of said other sequences is preferably at least 750.
Claim 5
Dependent Claim
24 words
The block copolymer as defined in claim 3 wherein there are at least two acrylonitrile sequences and at least two of the other sequences.
Claim 6
Dependent Claim
16 words
The block copolymer as defined in claim 4 wherein there are preferably at least five sequences.
Claim 7
Dependent Claim
24 words
The block copolymer as defined in claims 4 or 5 wherein said acrylonitrile sequences equal the sequences of said major portion of glutarimide units.
Claim 8
Dependent Claim
25 words
The block copolymer as defined in claims 1 or 2 wherein said acrylonitrile sequences comprises of from 1 to 99 mole percent said block copolymer.
Claim 9
Dependent Claim
24 words
The block copolymer as defined in claim 7 wherein said acrylonitrile sequences comprised of from 50 to 95 mole percent of said block copolymer.
Claim 10
Dependent Claim
25 words
The block copolymer as defined in claim 7 wherein said acrylonitrile sequences comprised of from 1 to 50 mole percent of said block copolymer composition.
Claim 11
Dependent Claim
26 words
The block copolymer composition as defined in claims 1 or 2 wherein said sequences including a major portion of said glutarimide units also include acrylamide units.
Claim 12
Dependent Claim
28 words
The block copolymer composition as defined in claims 1 or 2 wherein said sequences including a major portion of glutarimide units also include acrylamide and acrylic acid units.
Claim 13
Dependent Claim
26 words
The block copolymer as defined in claims 10 or 11 wherein said sequences including glutarimide units includes at least 55 mole percent of said glutarimide units.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |