US3197307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface modification of zinc oxide and electrophotographic member therefrom
Assignee: Eastman Kodak Co
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Filing: 1964-09-22
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Granted: 1965-07-27
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Expires: 1984-09-22
Abstract
No abstract record available.
Inventors
- 👤 Bernice B Blake
- 👤 Cornelia C Natale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:22
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/087
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
A PHOTOGRAPHIC ELEMENT FOR USE IN ELECTROSTATIC PHOTOGRAPHIC PROCESSES COMPRISING 30-90% OF A PHOTOCONDUCTIVE FINELY DIVIDED ZINC OXIDE OF IMPROVED DYE ADSORPTION CONTAINING ON AT LEAST 10% OF THE SURFACE OF THE ZINC OXIDE PARTICLES, A MODIFIER IN THE CONCENTRATION OF 0.14X10-5 TO 7.2X10-3 MOLE OF MODIFIER PER MOLE OF ZINC OXIDE, OBTAINED BY REACTING THE ZINC OXIDE WITH A LEWIS ACID STRONER THAN ZINC OXIDE, SAID ZINC OXIDE DISPERSED IN AN INSULATING FILM-FORMING MEDIUM AND COATED ON A NON-CONDUCTING SUBSTANCE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |