US3297787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of unsaturated dicarboxylic acid anhydrides and vinyl compounds
Assignee: Dow Chemical Co
•
Filing: 1963-04-26
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Granted: 1967-01-10
•
Expires: 1983-04-26
Abstract
No abstract record available.
Inventors
- 👤 Louis C Rubens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:06
CPC Classifications
C; C08; C08F; C08F257/00; C08F257/02; C08F8/00; C08F2810/00; C08F2810/20; Y; Y10; Y10S; Y10S525/00; Y10S525/912; Y10S525/915
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
72 words
A REACTIVE COPOLYMER CONSISTING ESSENTIALLY OF A BACKBONE COPOLYMER OF AN A,B-UNSATURATED DICARBOXYLIC ACID ANHYDRIDE AND AN ALKENYL AROMATIC MONOMER WHEREIN SAID BACKBONE COPOLYMER CONTAINS FROM ABOUT 1 TO ABOUT 25 WEIGHT PERCENT OF SAID ANHYDRIDE RANDOMLY DISTRIBUTED THEREIN AND FROM ABOUT 0.1 AND 1.0 MOLE OF A VINYL AMINE MONOMER PER MOLE OF ANHYDRIDE REACTED THEREWITH THROUGH AN AMIDE LINKAGE WITH THE REACTIVE VINYL GROUPS OF SAID AMINE MONOMER PENDANT THEREFROM.
Claim 2
Dependent Claim
72 words
A REACTIVE COPOLYMER CONSISTING ESSENTIALLY OF A BACKBONE COPOLYMER OF AN A,B-UNSATURATED DICARBOXYLIC ACID ANHYDRIDE AND AN ALKENYL AROMATIC MONOMER WHEREIN SAID BACKBONE COPOLYMER CONTAINS FROM ABOUT 1 TO ABOUT 25 WEIGHT PERCENT OF SAID ANHYDRIDE RANDOMLY DISTRIBUTED THEREIN AND FROM ABOUT 0.1 AND 1.0 MOLE OF A VINYL AMINE MONOMER PER MOLE OF ANHYDRIDE REACTED THEREWITH THROUGH AN AMIDE LINKAGE WITH THE REACTIVE VINYL GROUPS OF SAID AMINE MONOMER PENDANT THEREFROM.
Claim 3
Dependent Claim
25 words
A REACTIVE COPOLYMER ACCORDING TO CLAIM 1 DISSOLVED IN AN ALKENYL AROMATIC COMPOUND, THE SOLUTION CONTAINING FROM 5 TO 70 WEIGHT PERCENT OF THE COPOLYMER.
References Cited (Backward Citations)
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Cited
GB861871A
Cited
US2958673A
Cited
US3041315A
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |