US3232755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive layers for electrophotographic purposes
Assignee: Azoplate Corp
•
Filing: 1960-06-13
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Granted: 1966-02-01
•
Expires: 1980-06-13
Abstract
No abstract record available.
Inventors
- 👤 Hoegl Helmut
- 👤 Lind Erwin
- 👤 Schlesinger Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:28
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/04; C07D263/00; C07D263/02; C07D263/30; C07D263/32; C07D307/00; C07D307/02; C07D307/34; C07D307/36; C07D307/77; C07D307/78; C07D307/79; C07D307/91; C08; C08F; C08F24/00; C08F26/00; C08F26/06; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071; G03G5/072; G03G5/073; G03G9/00; G03G9/08; G03G9/087; G03G9/08702; G03G9/08726; G03G9/09; G03G9/0902; G03G9/0904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PHOTOGRAPHIC RERODUCTION PROCESS WHICH COMPRISES EXPOSING AN ELECTROSTATICALLY CHARGED, SUPPORTED, PHOTOCONDUCTIVE INSULATING LAYER TO LIGHT UNDER A MASTER AND DEVELOPING THE RESULTING IMAGE WITH AN ELECTROSCOPIC MATERIAL, THE PHOTOCONDUCTIVE LAYER COMPRISING AT LEAST ONE POLYMERIZED VINYL HETEROCYCLIC COMPOUND IN WHICH THE VINYL GROUP IS LINKED TO THE HETEROCYCLIC NUCLEUS BY A C-C LINKAGE AND AT LEAST ONE COMPOUND SELECTED FROM THE GROUP OF DYESTUFF SENSITIZERS AND ACTIVATORS.
Claim 2
Dependent Claim
68 words
A PHOTOGRAPHIC RERODUCTION PROCESS WHICH COMPRISES EXPOSING AN ELECTROSTATICALLY CHARGED, SUPPORTED, PHOTOCONDUCTIVE INSULATING LAYER TO LIGHT UNDER A MASTER AND DEVELOPING THE RESULTING IMAGE WITH AN ELECTROSCOPIC MATERIAL, THE PHOTOCONDUCTIVE LAYER COMPRISING AT LEAST ONE POLYMERIZED VINYL HETEROCYCLIC COMPOUND IN WHICH THE VINYL GROUP IS LINKED TO THE HETEROCYCLIC NUCLEUS BY A C-C LINKAGE AND AT LEAST ONE COMPOUND SELECTED FROM THE GROUP OF DYESTUFF SENSITIZERS AND ACTIVATORS.
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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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |