Patent US5017134A successfully refreshed from Google Patents.
US3264104A
Expired / Lapsed
US
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Reversal-development process for reproduction coatings containing diazo compounds
Assignee: Azoplate Corp
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Filing: 1962-07-25
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Granted: 1966-08-02
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Expires: 1982-07-25
Abstract
No abstract record available.
Inventors
- 👤 Reichel Maximilian Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:08
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A REVERSAL-DEVELOPMENT PROCESS WHICH COMPRISES EXPOSING TO A LIGHT IMAGE A SUPPORTED LAYER COMPRISING AT LEAST ONE NAPHTHOQUINONE-(1,2)-DIAZIDE COMPOUND AND AT LEAST ONE FILM-FORMING THERMOPLASTIC MATERIAL OF HIGH MOLECULAR WEIGHT SELECTED FROM THE GROUP CONSISTING OF HIGH WATER-INSOLUBLE CELLULOSE ETHER, POLYVINYL ESTER, AND POLYVINYL ACETALS, TREATING THE EXPOSED LAYER WITH A MEMBER OF THE GROUP CONSISTING OF WATER AND AN ALKALINE SOLUTION, EXPOSING THE ENTIRE LAYER TO LIGHT, AND TREATING THE EXPOSED LAYER WITH AN ALKALINE DEVELOPER, WHEREBY THOSE PORTIONS THEREOF WHICH WERE NOT STRUCK BY LIGHT DURING THE FIRST EXPOSURE ARE REMOVED.
Claim 2
Dependent Claim
93 words
A REVERSAL-DEVELOPMENT PROCESS WHICH COMPRISES EXPOSING TO A LIGHT IMAGE A SUPPORTED LAYER COMPRISING AT LEAST ONE NAPHTHOQUINONE-(1,2)-DIAZIDE COMPOUND AND AT LEAST ONE FILM-FORMING THERMOPLASTIC MATERIAL OF HIGH MOLECULAR WEIGHT SELECTED FROM THE GROUP CONSISTING OF HIGH WATER-INSOLUBLE CELLULOSE ETHER, POLYVINYL ESTER, AND POLYVINYL ACETALS, TREATING THE EXPOSED LAYER WITH A MEMBER OF THE GROUP CONSISTING OF WATER AND AN ALKALINE SOLUTION, EXPOSING THE ENTIRE LAYER TO LIGHT, AND TREATING THE EXPOSED LAYER WITH AN ALKALINE DEVELOPER, WHEREBY THOSE PORTIONS THEREOF WHICH WERE NOT STRUCK BY LIGHT DURING THE FIRST EXPOSURE ARE REMOVED.
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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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |