US3236640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of printing plates using particularly a photoconductivemultilayer structure
Assignee: Azoplate Corp
•
Filing: 1960-12-21
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Granted: 1966-02-22
•
Expires: 1980-12-21
Abstract
No abstract record available.
Inventors
- 👤 Tomanek Martha
- 👤 Uhlig Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:14
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/26; G03G13/28; G03G5/00; G03G5/14; G03G5/142; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR PREPARING A PRINTING PLATE WHICH COMPRISES EXPOSING A CHARGED, METAL SUPPORTED, PHOTOCONDUCTIVE INSULATING COATING, COMPRISING A FIRST LAYER COMPRISING AN ALKALI-SOLUBLE RESIN AND A SECOND LAYER COMPRISING AN ORGANIC PHOTOCONDUCTOR, TO LIGHT UNDER A MASTER, DEVELOPING AND FIXING THE RESULTING IMAGE, AND REMOVING THE NON-IMAGED AREAS OF THE COATING BY TREATMENT WITH AN ALKALINE LIQUID.
Claim 2
Dependent Claim
58 words
A PROCESS FOR PREPARING A PRINTING PLATE WHICH COMPRISES EXPOSING A CHARGED, METAL SUPPORTED, PHOTOCONDUCTIVE INSULATING COATING, COMPRISING A FIRST LAYER COMPRISING AN ALKALI-SOLUBLE RESIN AND A SECOND LAYER COMPRISING AN ORGANIC PHOTOCONDUCTOR, TO LIGHT UNDER A MASTER, DEVELOPING AND FIXING THE RESULTING IMAGE, AND REMOVING THE NON-IMAGED AREAS OF THE COATING BY TREATMENT WITH AN ALKALINE LIQUID.
References Cited (Backward Citations)
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US2857271A
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US3104169A
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |