US3837860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PHOTOSENSITIVE MATERIALS COMPRISING POLYMERS HAVING RECURRING PENDENT o-QUINONE DIAZIDE GROUPS
Assignee: Individual
•
Filing: 1969-06-16
•
Granted: 1974-09-24
•
Expires: 1989-06-16
Abstract
Abstract A photosensitive composition which comprises a natural or synthetic polymer having pendent recurring o-quinone diazide groups. The compositions are useful in elements for the preparation of relief images, photoresist applications, etc.
Inventors
- 👤 L Roos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:02
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/022; G03F7/023; C; C08; C08F; C08F8/00; C08F8/14; C08F2810/00; C08F2810/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
16 words
A composition according to claim 1, wherein said polymer nucleus is of a polyacrylic acid ester.
Claim 2
Dependent Claim
17 words
A composition according to claim 1, wherein said polymer nucleus is of a methacrylic acid ester copolymer.
Claim 3
Dependent Claim
16 words
A composition according to claim 1, wherein said polymer nucleus is of a poly(methyl methacrylate/hydroxyethyl methacrylate).
Claim 4
Dependent Claim
27 words
A composition according to claim 1, wherein the o-quinone diazide groups are 2-diazo-1-naphthol groups linked to the polymer nucleus in the 4-position through a sulfonic acid radical.
Claim 5
Dependent Claim
27 words
A composition according to claim 1, wherein the o-quinone diazide groups are 6-diazo-2,4-cyclohexadien-1-one groups linked to the polymer nucleus in the 4-position through a sulfonic acid radical.
Claim 6
Dependent Claim
9 words
A composition according to claim 1 in layer form.
Claim 7
Dependent Claim
19 words
A composition according to claim 1, wherein said polymer is a polyvinyl alcohol comprised of partially hydrolyzed polyvinyl acetatE.
Claim 8
Dependent Claim
95 words
A positive working photosensitive element which comprises a support bearing a photosensitive layer comprising a support bearing a photosensitive layer comprising a flexible photosensitive thermoplastic macromolecular polyvinyl alcohol or acrylic polymer having recurring pendent o-quinone diazide groups chemically bonded to said polymer, said layer being substantially free of groups which will react with the photoreaction products of said o-quinone diazide groups, wherein said o-quinone diazide groups are linked to the polymer through a carboxylic or sulfonic ester linkage, and the photoreaction products of said layer have greater solubility in a basic solution than said layer.
Claim 9
Dependent Claim
20 words
An element according to claim 9, wherein said polymer has been derived from a polymer of an acrylic acid ester.
Claim 10
Dependent Claim
20 words
An element according to claim 9 wherein said polymer has been derived from a copolymer of a methacrylic acid ester.
Claim 11
Dependent Claim
14 words
An element according to claim 11 wherein said copolymer is a poly(methyl methacrylate/hydroxyethyl methacrylate).
Claim 12
Dependent Claim
30 words
An element according to claim 9 wherein said o-quinone diazide groups of said polymer are 2-diazo-i-napthol groups linked to a colloid nucleus through a sulfonic acid group in the 4-position.
Claim 13
Dependent Claim
30 words
An element according to claim 9 wherein said o-quinone diazide groups of the polymer are 6-diazo-2,4-cyclohexadiene-1-one groups linked to a colloid nucleus through a sulfonic acid group in the 4-position.
Claim 14
Dependent Claim
20 words
An element according to claim 9 which further comprises a removable cover film laminated to the layer of photosensitive colloid.
Claim 15
Dependent Claim
34 words
An element according to claim 9 wherein the degree of adherence between said support and said photosensitive layer is such that said support can be easily stripped in dry condition from said photosensitive layer.
Claim 16
Dependent Claim
17 words
An element according to claim 9, wherein said polymer has been derived from partially hydrolyzed polyvinyl acetate.
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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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |