US3285837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic development process for photoconductive copysheets
Assignee: 3M Co
•
Filing: 1963-01-09
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Granted: 1966-11-15
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Expires: 1983-01-09
Abstract
No abstract record available.
Inventors
- 👤 Byron W Neher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:18
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
AN ELECTROLYTIC DEVELOPMENT PROCESS FOR DEVELOPING AN EXPOSED COPYSHEET HAVING A PHOTOCONDUCTIVE LAYER ON A CONTIGUOUS ELECTRICALLY CONDUCTIVE BACKING WHICH COMPRISES CONTACTING THE EXPOSED SURFACE OF SAID COPYSHEET WITH AN ELECTROLYTICALLY CONDUCTIVE DEVELOPER SOLUTION HAVING DISSOLVED THEREIN AN IONIZABLE ANIONIC DYE PROVIDING A NEGATIVELY CHARGED CHROMOPHORE AND A POLYVALENT METAL CATION SELECTED FROM THE GROUP CONSISTING OF NICKEL, MAGNESIUM, ZINC AND CALCIUM, AND ELECTROLYZING SAID DEVELOPER SOLUTION, THE ELECTRICALLY CONDUCTIVE BACKING OF SAID COPYSHEET BEING CONNECTED TO SERVE AS THE CATHODE.
Claim 2
Dependent Claim
81 words
AN ELECTROLYTIC DEVELOPMENT PROCESS FOR DEVELOPING AN EXPOSED COPYSHEET HAVING A PHOTOCONDUCTIVE LAYER ON A CONTIGUOUS ELECTRICALLY CONDUCTIVE BACKING WHICH COMPRISES CONTACTING THE EXPOSED SURFACE OF SAID COPYSHEET WITH AN ELECTROLYTICALLY CONDUCTIVE DEVELOPER SOLUTION HAVING DISSOLVED THEREIN AN IONIZABLE ANIONIC DYE PROVIDING A NEGATIVELY CHARGED CHROMOPHORE AND A POLYVALENT METAL CATION SELECTED FROM THE GROUP CONSISTING OF NICKEL, MAGNESIUM, ZINC AND CALCIUM, AND ELECTROLYZING SAID DEVELOPER SOLUTION, THE ELECTRICALLY CONDUCTIVE BACKING OF SAID COPYSHEET BEING CONNECTED TO SERVE AS THE CATHODE.
References Cited (Backward Citations)
US3057787A
Cited
US3106517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |