Patent US3290147A successfully refreshed from Google Patents.
US3290147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic organic photoconductors
Assignee: Warren SD Co
•
Filing: 1963-08-07
•
Granted: 1966-12-06
•
Expires: 1983-08-07
Abstract
No abstract record available.
Inventors
- 👤 Mattor John Alan
- 👤 Henderson Dumont Biglar
- 👤 Millard Ben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:06
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/135; C07C; C07C251/00; C07C251/72; C07C251/88; C07D263/00; C07D263/02; C07D263/30; C07D263/34; C07D263/36; C07D263/42; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0631; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
AN ELECTROPHOTOGRAPHIC COPY SHEET COMPRISING A PHOTOCONDUCTIVE INSULATING LAYER ON A CONDUCTIVE SUPPORT, THE PHOTOCONDUCTIVE LAYER CONTAINING A PHOTOCONDUCTIVE COMPOUND SELECTED FROM THE CLASS OF COMPOUNDS KNOWN AS ARYLIDENEAZINES AND HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
34 words
AN ELECTROPHOTOGRAPHIC COPY SHEET COMPRISING A PHOTOCONDUCTIVE INSULATING LAYER ON A CONDUCTIVE SUPPORT, THE PHOTOCONDUCTIVE LAYER CONTAINING A PHOTOCONDUCTIVE COMPOUND SELECTED FROM THE CLASS OF COMPOUNDS KNOWN AS ARYLIDENEAZINES AND HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US3041165A
Cited
US3066023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |