US3920618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New photopolymers
Assignee: National Institute of Advanced Industrial Science and Technology
•
Filing: 1973-10-05
•
Granted: 1975-11-18
•
Expires: 1993-10-05
Abstract
Abstract Novel photopolymers having as photocrosslinking radicals Alpha -substituted maleimido groups of the formula: wherein Ar stands for a cyclic group of aromaticity and R1 for a hydrogen atom or cyano group. These photopolymers can be produced by introducing the Alpha -substituted maleimido groups into a backbone molecular chain of a linear polymer or copolymer according to a reaction known per se, such as amidation, imidation, esterification, quaternization or nuclear substitution.
Inventors
- 👤 Kunihiro Ichimura
- 👤 Hideo Ochi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:03
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08F; C08F8/00; C08F8/10; C08F8/30; G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/50
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
18 words
PHOTOPOLYMERS CHARACTERIZED BY A VINYL POLYMER BACK BONE HAVING AS PHOTOCROSSLINKING RADICALS A-SUBSTITUTED MALEIMIDO GROUPS OF THE FORMULA:
Claim 2
Dependent Claim
18 words
PHOTOPOLYMERS CHARACTERIZED BY A VINYL POLYMER BACK BONE HAVING AS PHOTOCROSSLINKING RADICALS A-SUBSTITUTED MALEIMIDO GROUPS OF THE FORMULA:
Claim 3
Dependent Claim
22 words
Photopolymers according to claim 1 which comprise a linear vinyl polymer or copolymer having as pendant groups therealong, groups of the formula:
Claim 4
Dependent Claim
11 words
Photopolymers according to claim 2 wherein Ar is a phenyl group.
Claim 5
Dependent Claim
12 words
Photopolymers according to claim 2 wherein Ar is a substituted phenyl group.
Claim 6
Dependent Claim
11 words
Photopolymers according to claim 2 wherein Ar is a pyridyl group.
Claim 7
Dependent Claim
12 words
Photopolymers according to claim 2 wherein said group is p-( Alpha -phenylmaleimidi)-phenyl.
Claim 8
Dependent Claim
12 words
Photopolymers according to claim 2 wherein said group is Alpha -phenylmaleimidomethylpyridinium chloride-(4).
Claim 9
Dependent Claim
14 words
Photopolymers according to claim 2 wherein said group is Alpha -phenyl- Beta -cyano-maleimidomethyl-5-ethylpyridinium chloride-(4).
Claim 10
Dependent Claim
11 words
Photopolymers according to claim 2 wherein said group is Alpha -phenylmaleimidomethylphenyl.
Claim 11
Dependent Claim
11 words
Photopolymers according to claim 2 wherein said group is Alpha -phenylmaleimidomethylbenzyl.
Claim 12
Dependent Claim
12 words
Photopolymers according to claim 2 wherein said group is 2-( Alpha -phenylmaleimido)-ethyloxycarbonyl.
Claim 13
Dependent Claim
11 words
Photopolymers according to claim 2 wherein said group is Alpha -phenylmaleimidoaclyloxy.
Claim 14
Dependent Claim
11 words
Photopolymerizable linear vinyl polymers containing recurring structural units of the formula:
Claim 15
Dependent Claim
11 words
Photopolymerizable linear vinyl polymers containing recurring structural units of the formula:
Claim 16
Dependent Claim
21 words
The polymers of claim 13 wherein at about 1% up to about 80% of the recurring units thereof have said formula.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |