Patent US3890152A successfully refreshed from Google Patents.
US3890152A
Expired / Lapsed
US
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Light-sensitive copying composition containing diazo resin and quinone diazide
Assignee: Hoechst AG
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Filing: 1972-09-21
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Granted: 1975-06-17
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Expires: 1992-09-21
Abstract
Abstract This invention relates to a light-sensitive composition comprising at least one diazonium salt mixed condensate and at least one compound selected from the group consisting of an oquinone diazide sulfonic amide and an o-quinone diazide sulfonic ester.
Inventors
- 👤 Hans Ruckert
- 👤 Rainer Unholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:33
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/095
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
26 words
A LIGHT-SENSITIVE COMPOSITION COMPRISING, IN A HOMOGENEOUS ADMIXTURE, (1) AT LEAST ONE DIAXONIUM SALT MIXED CONDENSATION PRODUCT COMPRISING REPEATING UNITS OF EACH OF THE GENERAL TYPES
Claim 2
Dependent Claim
26 words
A LIGHT-SENSITIVE COMPOSITION COMPRISING, IN A HOMOGENEOUS ADMIXTURE, (1) AT LEAST ONE DIAXONIUM SALT MIXED CONDENSATION PRODUCT COMPRISING REPEATING UNITS OF EACH OF THE GENERAL TYPES
Claim 3
Dependent Claim
35 words
A light-sensitive composition according to claim 1, containing the diazonium salt mixed condensate and the o-quinone diazide sulfonic acid derivative in quantities such that 1 to 2 diazide groups are present per diazonium salt group.
Claim 4
Dependent Claim
18 words
A light-sensitive composition according to claim 1, in the form of a solid light-sensitive layer on a support.
Claim 5
Dependent Claim
15 words
A light-sensitive composition according to claim 3, in which the support is an aluminum plate.
References Cited (Backward Citations)
US1967371A
Cited
US2702243A
Cited
US3211553A
Cited
US3113023A
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US3544317A
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US3502470A
Cited
US3634086A
Cited
US3526503A
Cited
US3634082A
Cited
US3573917A
Cited
US3679419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |