Patent US4376289A successfully refreshed from Google Patents.
US3279918A
Expired / Lapsed
US
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Electrophotographic material
Assignee: Gevaert Photo Producten NV
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Filing: 1960-02-04
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Granted: 1966-10-18
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Expires: 1980-02-04
Abstract
No abstract record available.
Inventors
- 👤 Cassiers Paul Maria
- 👤 Nys Jean Marie
- 👤 Willems Jozef Frans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:13
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/64; C07D209/00; C07D209/02; C07D209/04; C07D209/08; C07D209/30; C07D209/32; C07D209/36; C07D235/00; C07D235/02; C07D235/04; C07D235/06; C07D235/08; C07D235/18; C07D235/20; C07D263/00; C07D263/02; C07D263/30; C07D263/32; C07D263/52; C07D263/54; C07D263/56; C07D263/57; C07D277/00; C07D277/60; C07D277/62; C07D277/64; C07D277/66; C07D403/00; C07D403/02; C07D403/04; C07D417/00; C07D417/02; C07D417/04; C09; C09B; C09B23/00; C09B23/02; C09B23/10; C09B23/16; C09B23/162; C09B23/164; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0629; G03G5/0631; G03G5/0644; G03G5/0661; G03G5/0664; G03G5/0666; G03G5/0668; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/16; Y10S260/17; Y10S260/19; Y10S260/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A PHOTOGRAPHIC REPRODUCTION PROCESS WHICH COMPRISES EXPOSING AN ELECTROSTATICALLY CHARGED PHOTOCONDUCTIVE INSULATING LAYER TO A LIGHT IMAGE WHEREBY THE LIGHTSTRUCK AREA IS DISCHARGED, AND DEVELOPING THE RESULTING ELECTROSTATIC IMAGE WITH AN ELECTROSCOPIC MATERIAL, SAID LAYER COMPRISING A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
41 words
A PHOTOGRAPHIC REPRODUCTION PROCESS WHICH COMPRISES EXPOSING AN ELECTROSTATICALLY CHARGED PHOTOCONDUCTIVE INSULATING LAYER TO A LIGHT IMAGE WHEREBY THE LIGHTSTRUCK AREA IS DISCHARGED, AND DEVELOPING THE RESULTING ELECTROSTATIC IMAGE WITH AN ELECTROSCOPIC MATERIAL, SAID LAYER COMPRISING A COMPOUND HAVING THE FORMULA:
References Cited (Backward Citations)
CA580075A
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US2297691A
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US2550321A
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Cited
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Cited
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FR1232805A
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |