Patent US4075023A successfully refreshed from Google Patents.
US4075023A
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Polymerizable unsaturated oxazolidines and tetrahydro-1,3-oxazines and polymers thereof
Assignee: Agfa Gevaert NV
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Filing: 1972-12-19
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Granted: 1978-02-21
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Expires: 1992-12-19
Abstract
Abstract Oxazolidines and tetrahydro-1,3-oxazines which are substituted with 3-acryloyl or 3-methacryloyl groups are prepared by adding to an excess of a ketone and in the presence of a hydrogen chloride acceptor, about equimolecular amounts of a 2- or 3-amino lower alkanol and of acryloyl chloride or methacryloyl chloride, heating the mixture, and eliminating the unreacted ketone by destillation. The ketone corresponds to the formula: <IMAGE> wherein R1 = alkyl (1-4 C), R2 = alkyl (1-4 C) or phenyl, or R1 and R2 together represent the atoms necessary to complete an alicyclic group.
Inventors
- 👤 Jan Josef Priem
- 👤 Walter Frans De Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:00
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/04; C07D263/52; C07D265/00; C07D265/04; C07D265/06; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/58; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A gelatin layer comprising gelatin and up to 50% by weight of the amount of dry gelatin present of a homopolymer of a vinyl monomer corresponding to one of the general formulae: ##STR10## wherein: R represents hydrogen or methyl, R 1 is a C 1 -C 4 alkyl group and R 2 is a C 1 -C 4 alkyl group or a phenyl group, each of R 3 , R 4 , R 5 and R 6 represents a hydrogen atom, a methyl group, or an ethyl group, and each of R 7 , R 8 and R 9 represents a hydrogen atom or a methyl group.
Claim 2
Dependent Claim
107 words
A gelatin layer comprising gelatin and up to 50% by weight of the amount of dry gelatin present of a homopolymer of a vinyl monomer corresponding to one of the general formulae: ##STR10## wherein: R represents hydrogen or methyl, R 1 is a C 1 -C 4 alkyl group and R 2 is a C 1 -C 4 alkyl group or a phenyl group, each of R 3 , R 4 , R 5 and R 6 represents a hydrogen atom, a methyl group, or an ethyl group, and each of R 7 , R 8 and R 9 represents a hydrogen atom or a methyl group.
Claim 3
Dependent Claim
18 words
A gelatin layer according to claim 1, wherein said gelatin layer forms part of a photographic light-sensitive material.
Claim 4
Dependent Claim
114 words
A gelatin layer comprising gelatin and up to 50% by weight of the dry gelatin present therein of a comonomer of a vinyl monomer corresponding to one of the general formulae: ##STR11## wherein: R represents hydrogen or methyl, R 1 is a C 1 -C 4 alkyl group and R 2 is a C 1 -C 4 alkyl group or a phenyl group, each of R 3 , R 4 , R 5 and R 6 represents a hydrogen atom, a methyl group, or an ethyl group, and each of R 7 , R 8 and R 9 represents a hydrogen atom or a methyl group with at least one other ethylenically unsaturated monomer.
Claim 5
Dependent Claim
114 words
A gelatin layer comprising gelatin and up to 50% by weight of the dry gelatin present therein of a comonomer of a vinyl monomer corresponding to one of the general formulae: ##STR11## wherein: R represents hydrogen or methyl, R 1 is a C 1 -C 4 alkyl group and R 2 is a C 1 -C 4 alkyl group or a phenyl group, each of R 3 , R 4 , R 5 and R 6 represents a hydrogen atom, a methyl group, or an ethyl group, and each of R 7 , R 8 and R 9 represents a hydrogen atom or a methyl group with at least one other ethylenically unsaturated monomer.
Claim 6
Dependent Claim
18 words
A gelatin layer according to claim 3, wherein said gelatin layer forms part of a photographic light-sensitive material.
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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) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |