Patent US4892949A successfully refreshed from Google Patents.
US4892949A
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Stilbene derivatives
Assignee: Ricoh Co Ltd
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Filing: 1988-08-09
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Granted: 1990-01-09
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Expires: 2008-08-09
Abstract
Abstract An electrophotograhic photoconductor is disclosed which comprises an electroconductive support material and a photosensitive layer comprising at least one of the stilbene compounds of the formula ##STR1## wherein R 1 represents hydrogen or ##STR2## R 2 represents hydrogen, an alkyl group or a substituted or unsubstituted phenyl group; A represents ##STR3## when R 1 is hydrogen; while when R 1 is ##STR4## A represents ##STR5## a 9-anthryl group or a substituted or unsubstituted N-alkylcarbazolyl group, wherein R 3 represents hydrogen, an alkyl group, an alkoxy group, a halogen or a substituted amino group represented by ##STR6## in which R 4 and R 5 independently represent an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group, and R 4 and R 5 may form a ring in combination, and m is an integer of 0 through 3 and n is an integer of 0 or 1, provided that, when R 1 is hydrogen and n=0, A is ##STR7## in which R 6 is hydrogen, an alkyl group, an alkoxy group or a halogen, and R 4 and R 5 are the same as defined above.
Inventors
- 👤 Masaomi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:28
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/06; C07C; C07C255/00; C07D209/00; C07D209/56; C07D209/80; C07D209/82; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0668
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
120 words
A compound having the formula ##STR524## wherein n is 0 or 1, R 2 is hydrogen, alkyl or phenyl; the pair (R 1 , A) is selected from the group consisting of (a) R 1 is hydrogen, A is ##STR525## (b) R 1 is ##STR526## A is selected from the group consisting of ##STR527## N-alkyl carbazolyl, and substituted N-alkyl carbazolyl, and (c) R 1 is hydrogen or ##STR528## ##STR529## wherein R 3 is hydrogen alkyl, alkoxy, or halogen, and R 4 and R 5 independently represent alkyl, aryl, substituted aryl, aralkyl and substituted aralkyl, and m is an integer of from 0 to 2, provided that when R 1 is hydrogen and n is 1, R 2 is not hydrogen.
Claim 2
Dependent Claim
120 words
A compound having the formula ##STR524## wherein n is 0 or 1, R 2 is hydrogen, alkyl or phenyl; the pair (R 1 , A) is selected from the group consisting of (a) R 1 is hydrogen, A is ##STR525## (b) R 1 is ##STR526## A is selected from the group consisting of ##STR527## N-alkyl carbazolyl, and substituted N-alkyl carbazolyl, and (c) R 1 is hydrogen or ##STR528## ##STR529## wherein R 3 is hydrogen alkyl, alkoxy, or halogen, and R 4 and R 5 independently represent alkyl, aryl, substituted aryl, aralkyl and substituted aralkyl, and m is an integer of from 0 to 2, provided that when R 1 is hydrogen and n is 1, R 2 is not hydrogen.
Claim 3
Dependent Claim
38 words
A compound having the formula ##STR530## wherein R 2 is hydrogen, alkyl or phenyl, R 4 and R 5 independently are alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and R 6 is hydrogen, alkyl, alkoxy or halogen.
Claim 4
Dependent Claim
38 words
A compound having the formula ##STR530## wherein R 2 is hydrogen, alkyl or phenyl, R 4 and R 5 independently are alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and R 6 is hydrogen, alkyl, alkoxy or halogen.
Claim 5
Dependent Claim
19 words
A compound as claimed in claim 2 in which R 4 and R 5 are benzyl or substituted benzyl.
Claim 6
Dependent Claim
21 words
A compound as claimed in claim 2 in which R 4 is alkyl and R 5 is benzyl or substituted benzyl.
Claim 7
Dependent Claim
19 words
A compound as claimed in claim 2 in which R 4 and R 5 are phenyl or substituted phenyl.
Claim 8
Dependent Claim
21 words
A compound as claimed in claim 2 in which R 4 is alkyl and R 5 is phenyl or substituted phenyl.
Claim 9
Dependent Claim
24 words
A compound as claimed in claim 2 in which R 4 is benzyl or substituted benzyl, and R 5 is phenyl or substituted phenyl.
Claim 10
Dependent Claim
68 words
A compound having the formula ##STR531## wherein n is 0 or 1, R 2 is hydrogen, alkyl, or phenyl, and A is selected from the group consisting of ##STR532## N-alkyl carbazolyl, and substituted N-alkyl carbazolyl, R 3 is hydrogen, alkyl, alkoxy or halogen, R 4 and R 5 independently are alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and m is an integer of from 0 to 2.
Claim 11
Dependent Claim
68 words
A compound having the formula ##STR531## wherein n is 0 or 1, R 2 is hydrogen, alkyl, or phenyl, and A is selected from the group consisting of ##STR532## N-alkyl carbazolyl, and substituted N-alkyl carbazolyl, R 3 is hydrogen, alkyl, alkoxy or halogen, R 4 and R 5 independently are alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and m is an integer of from 0 to 2.
Claim 12
Dependent Claim
19 words
A compound as claimed in claim 8 in which R 4 and R 5 are benzyl or substituted benzyl.
Claim 13
Dependent Claim
21 words
A compound as claimed in claim 8 in which R 4 is alkyl and R 5 is benzyl or substituted benzyl.
Claim 14
Dependent Claim
19 words
A compound as claimed in claim 8 in which R 4 and R 5 are phenyl or substituted phenyl.
Claim 15
Dependent Claim
21 words
A compound as claimed in claim 8 in which R 4 is alkyl and R 5 is phenyl or substituted phenyl.
Claim 16
Dependent Claim
24 words
A compound as claimed in claim 8 in which R 4 is benzyl or substituted benzyl, and R 5 is phenyl or substituted phenyl.
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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) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |