US3102809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Naphthoquinone-(1,2)-diozides and printing plates made therewith
Assignee: Azoplate Corp
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Filing: 1960-07-21
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Granted: 1963-09-03
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Expires: 1980-07-21
Abstract
No abstract record available.
Inventors
- 👤 Endermann Fritz
- 👤 Uhlig Fritz
- 👤 Stahlhofen Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:44
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/022
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
A PROCESS FOR MAKING A PRINTING PLATE WHICH COMPRESES EXPOSING A COATED BASE MATERIAL TO LIGHT UNDER A MASTER, THE COATING COMPRISING AN ESTER OF A NAPHTHOQUINONE-(1,2)-DIAZIDE SULFONIC ACID WITH AN ANTHRAQUINONE SUBSTITUTED BY AT LAST TWO HYDROXYL GROUP, THE ESTER CONTAINING AT LAST ONE FREE HYDROXYL GROUP IN A NEIGHBORING POSITION TO A CARBON ATOM WHICH, IN THE ANTHRAQUINONE NUCLEUS, IS COMMON TO TWO RINGS, AND TREATING THE EXPOSED COATING WITH A DILUTE ALKALI DEVELOPING SOLUTION.
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) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |