US4594306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive copying material with o-quinone diazide and phenolic hydroxy compound
Assignee: Hoechst AG
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Filing: 1984-08-17
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Granted: 1986-06-10
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Expires: 2004-08-17
Abstract
Abstract This invention relates to an improvement in a light-sensitive copying material comprising a carrier and a light-sensitive copying layer which contains, as the light-sensitive compound, an o-quinone diazide sulfonic acid ester or an o-quinone diazide sulfonic acid amide, the improvement being that the layer also contains a compound with an aromatic or aliphatic hydroxy group which is capable of forming chelate compounds.
Inventors
- 👤 Paul Stahlhofen
- 👤 Rainer Beutel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:07
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/022; G03F7/0226; G03C; G03C1/00; G03C1/52; G03C1/54; G03C1/56
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
A light-sensitive copying material comprising (A) an anodized aluminum support and (B) a positive-working, light-sensitive copying layer immediately adjacent to said support, said copying layer containing (i) an alkali-soluble resin, (ii) one selected from the group consisting of an o-quinone diazide sulfonic acid ester and an o-quinone diazide sulfonic acid amide; and (iii) at least one phenolic hydroxy compound selected from the group consisting of 8-hydroxy-quinoline, 2,3,4-trihydroxy-benzophenone and 1,2,4-trihydroxy-anthraquinone, said phenolic hydroxy compound being present in said copying layer in an amount between about 0.3 and 15 weight-percent, based on the weight of solid components in said copying layer.
Claim 2
Dependent Claim
99 words
A light-sensitive copying material comprising (A) an anodized aluminum support and (B) a positive-working, light-sensitive copying layer immediately adjacent to said support, said copying layer containing (i) an alkali-soluble resin, (ii) one selected from the group consisting of an o-quinone diazide sulfonic acid ester and an o-quinone diazide sulfonic acid amide; and (iii) at least one phenolic hydroxy compound selected from the group consisting of 8-hydroxy-quinoline, 2,3,4-trihydroxy-benzophenone and 1,2,4-trihydroxy-anthraquinone, said phenolic hydroxy compound being present in said copying layer in an amount between about 0.3 and 15 weight-percent, based on the weight of solid components in said copying layer.
Claim 3
Dependent Claim
13 words
Copying material according to claim 1, wherein said alkali-soluble resin comprises a novolak.
Claim 4
Dependent Claim
14 words
Copying material as claimed in claim 1, wherein said phenolic hydroxy compound is 2,3,4-trihydroxybenzophenone.
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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) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |