US3674473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cumulene containing photoconductive binder elements for use in electrophotography
Assignee: AB Dick Co
•
Filing: 1970-10-06
•
Granted: 1972-07-04
•
Expires: 1990-10-06
Abstract
Abstract A PHOTOELECTROSTATIC MEMBER IS PREPARED BY APPLYING A PHOTOCONDUCTIVE LAYER CONTAINING A COMPOUND SELECTED FROM THE GENERAL CLASS OF CUMULENES DISPERSED IN A RESIN BINDER. THE CUMULENE COMPOUNDS USEFUL IN THE INSTANT INVENTION HAVE ONE OF THE FOLLOWING GENERAL FORMULAS: Q1=(C=)=Q2, Q1=(C=)N-C(-R)-C6H3(-X)-C(-R)(=C)N=Q2 WHERE X REPRESENTS AN ALKYL, HYDROGEN, HALOGEN, OR NITRO SUBSTITUENT; Q1 AND Q2 CAN BE: >C(-R1)-R2 INDENE, OR FLUORENE; N CAN BE AN INTEGER FROM 1 THROUGH 6; R IS LOWER ALKYL, ARYL OR HYDROGEN; R1 AND R2 CAN BE ARYL, SUBSTITUTED ARYL, HETEROCYCLIC RING STRUCTURES; AND WHEREIN Q1, Q2, OR R1, AND R2 CAN BE THE SAME OR DIFFERENT.
Inventors
- 👤 Robert G Blanchette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:49
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0661; G03G5/0601; G03G5/0605; G03G5/0607; G03G5/0618
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |