Patent US4565757A successfully refreshed from Google Patents.
US4565757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive compositions sensitive to both laser light and tungsten halide light
Assignee: MADELEINE AS SCIL AGENT LLC
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Filing: 1983-12-15
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Granted: 1986-01-21
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Expires: 2003-12-15
Abstract
Abstract A photoconductive composition comprises a photoconductor and a sensitizer. The sensitizer has the formula <IMAGE> wherein R represents alkyl; R1 represents H, alkyl or aryl; R2 represents the atoms required to complete a hetero or carboxyclic ring; A- represents an anion; and n represents the valency of the anion. The composition is sensitive to both laser light sources and tungsten light sources and is useful in electrophotographic reproduction.
Inventors
- 👤 Anthony J. Chalk
- 👤 Graham Charnock
- 👤 Allen P. Gates
- 👤 David E. Murray
- 👤 Ian S. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:43
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
43 words
A photoconductive composition comprising at least one photoconductor and, as sensitiser, a compound having the formula; wherein R represents alkyl; R1 represents alkyl or aryl; R2 represents the atoms required to complete a hetero or carbocylic ring and A n- represents an anion.
Claim 2
Dependent Claim
43 words
A photoconductive composition comprising at least one photoconductor and, as sensitiser, a compound having the formula; wherein R represents alkyl; R1 represents alkyl or aryl; R2 represents the atoms required to complete a hetero or carbocylic ring and A n- represents an anion.
Claim 3
Dependent Claim
34 words
A composition according to claim 1 in which the sensitiser compound is 2-[2-(9-ethyl-3-carbazolyl)-vinyl]-1,3,3-trimethyl-3H-indolium tetrafluoroborate; 2-[2-(9-ethyl-3-carbazolyl)-vinyl]-1,3,3-trimethyl-5-nitro-3H-indolium tetrafluoroborate; 2-[2-(9-ethyl-3-carbazolyl)-vinyl]-1,3,3-trimethyl-5-chloro-3H-indolium chloride; 2-[2-(6-bromo-9-ethyl-3-carbazolyl)-vinyl]-1,3,3-trimethyl-3H-indolium hexafluorophosphate; 2-[2-(2-ethoxy-9-ethyl-3-carbazolyl)-vinyl]-1,3,3-trimethyl-3H-indolium tetrafluoroborate; 2-[2-(5,6,7,8-tetrahydro-9-ethyl-3-carbazolyl)-vinyl]-1,3,3-trimethyl-3H-indolium tetrafluoroborate; 2-[2-(6-diethylamino-9-ethyl-3-carbazolyl)-vinyl]-1,3,3-trimethyl-3H-indolium trifluoromethane sulphonate; 2-[2-(9-phenyl-3-carbazolyl)-vinyl]-1,3,3-trimethyl-3H-indolium p-toluene sulphonate; 2-[2-(9-propyl-6-pyrido[2,3-b]indolyl)-vinyl]-1,3,3-trimethyl-3H-indolium tetrafluoroborate; 2-[2-(4-ethyl-7-thieno[3,2-b]indolyl)-vinyl]-1,3,3-trimethyl-3H-indolium chloride.
Claim 4
Dependent Claim
18 words
A composition according to claim 1 containing 0.01% to 10% by weight of sensitiser, based on the photoconductor.
Claim 5
Dependent Claim
16 words
A composition according to claim 3, containing 2-5% by weight of sensitiser based on the photoconductor.
Claim 6
Dependent Claim
16 words
A composition according to claim 1, in which the photoconductor is an oxazole, or an oxadiazole.
Claim 7
Dependent Claim
16 words
A composition according to claim 5, in which the photoconductor is 2-phenyl-4-(2'chloro phenyl)-5-(4"diethylaminophenyl)-oxazole or 2,5-bis-(4'diethylamino)-1,3,4 oxadiazole.
Claim 8
Dependent Claim
10 words
A composition according to claim 1 including a resin binder.
Claim 9
Dependent Claim
24 words
A composition according to claim 1 in which the anion is chloride, bromide tetrafluoroborate, hexafluorophosphate, p-toluene sulphonate, lauryl sulphate, methyl sulphate or methyl sulphonate.
Claim 10
Dependent Claim
13 words
A composition according to claim 1 including at least one additional sensitising dye.
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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |