US4341852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycyanoanthracenes and use as sensitizers for electrophotographic compositions
Assignee: Eastman Kodak Co
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Filing: 1980-10-02
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Granted: 1982-07-27
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Expires: 2000-10-02
Abstract
Abstract Polycyanoanthracenes containing three or more cyano groups, and in particular the novel compound 2,6,9,10-tetracyanoanthracene, are sensitizers for organic photoconductors.
Inventors
- 👤 Susan L. Mattes
- 👤 Samir Y. Farid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:35
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
25 words
An electrically insulating organic photoconductive composition comprising an electron donor organic photoconductor and a sensitizing amount of a polycyanoanthracene containing three or more cyano groups.
Claim 2
Dependent Claim
25 words
An electrically insulating organic photoconductive composition comprising an electron donor organic photoconductor and a sensitizing amount of a polycyanoanthracene containing three or more cyano groups.
Claim 3
Dependent Claim
18 words
An electrically insulating organic photoconductive composition comprising an electron donor organic photoconductor and a sensitizing amount of 2,6,9,10-tetracyanoanthracene.
Claim 4
Dependent Claim
18 words
An electrically insulating organic photoconductive composition comprising an electron donor organic photoconductor and a sensitizing amount of 2,6,9,10-tetracyanoanthracene.
Claim 5
Dependent Claim
13 words
A photoconductive composition of claim 2 wherein the organic photoconductor is a triarylamine.
Claim 6
Dependent Claim
21 words
An electrophotographic element comprising a support bearing a layer of a photoconductive composition of any one of claims 2, or 3.
Claim 7
Dependent Claim
1 words
2,6,9,10-Tetracyanoanthracene.
Claim 8
Dependent Claim
1 words
2,6,9,10-Tetracyanoanthracene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-26 | 1986-01-25 | 1986-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-26 | 1990-01-25 | 1990-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-26 | 1994-01-25 | 1994-07-27 | $7700.00 | Window Closed / Lapsed |