Patent US3252835A successfully refreshed from Google Patents.
US3252835A
Expired / Lapsed
US
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Sensitization of electrophotographic layers
Assignee: Agfa Gevaert NV
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Filing: 1961-05-31
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Granted: 1966-05-24
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Expires: 1981-05-31
Abstract
No abstract record available.
Inventors
- 👤 Nissl Franz
- 👤 Gesierich Wolf
- 👤 Schwarzkopf Gerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:08
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR THE PRODUCTION OF A SENSITIZED ELECTROPHOTOGRAPHIC MATERIAL WHICH COMPRISES (A) MIXING A DISPERSION CONSISTING ESSENTIALLY OF A SENSITIZING DYE, PHOTOCONDUCTIVE ZINC OXIDE AND A NONPOLAR ORGANIC SOLVENT THAT IS IMMISCIBLE WITH WATER, HAS A BOILING POINT BELOW 180*C., AND A DIELECTRIC CONSTANT BELOW 10, AND IN WHICH BOTH THE ZINC OXIDE AND THE SENSITIZING DYE ARE AT LEAST DIFFICULTY SOLUBLE, (B) THEREAFTER MIXING THE SAID DISPERSION WITH A NON-POLAR SOLUTION OF A FILM-FORMING INSULATING BINDING AGENT, (C) CASTING THE LATTER MIXTURE ON TO A SHEET-LIKE CONDUCTIVE SUPPORT AND DRYING THE SAME, THEREBY FORMING A LAYER OF THE SAID BINDING AGENT, CONTAINING PHOTOCONDUCTIVE ZINC OXIDE THAT IS SENSITIZED BY THE SAID SENSITIZING DYE.
Claim 2
Dependent Claim
115 words
A PROCESS FOR THE PRODUCTION OF A SENSITIZED ELECTROPHOTOGRAPHIC MATERIAL WHICH COMPRISES (A) MIXING A DISPERSION CONSISTING ESSENTIALLY OF A SENSITIZING DYE, PHOTOCONDUCTIVE ZINC OXIDE AND A NONPOLAR ORGANIC SOLVENT THAT IS IMMISCIBLE WITH WATER, HAS A BOILING POINT BELOW 180*C., AND A DIELECTRIC CONSTANT BELOW 10, AND IN WHICH BOTH THE ZINC OXIDE AND THE SENSITIZING DYE ARE AT LEAST DIFFICULTY SOLUBLE, (B) THEREAFTER MIXING THE SAID DISPERSION WITH A NON-POLAR SOLUTION OF A FILM-FORMING INSULATING BINDING AGENT, (C) CASTING THE LATTER MIXTURE ON TO A SHEET-LIKE CONDUCTIVE SUPPORT AND DRYING THE SAME, THEREBY FORMING A LAYER OF THE SAID BINDING AGENT, CONTAINING PHOTOCONDUCTIVE ZINC OXIDE THAT IS SENSITIZED BY THE SAID SENSITIZING DYE.
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) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |