Patent US4677045A successfully refreshed from Google Patents.
US4677045A
Expired / Lapsed
US
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Squarylium charge generating dye and electrophotographic photoconductor
Assignee: IBM Information Products Corp
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Filing: 1986-05-05
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Granted: 1987-06-30
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Expires: 2006-05-05
Abstract
Abstract A squarylium dye molecule is synthesized from a phenolic precursor. The resulting hydroxy pyrrolidino squarylium (OHPYRRSQ) dye does not have to be purified in order to provide the dye with a negative response in the Ames test for mutagenicity. A xerographic photoconductor using the molecule shows superior electrophotographic performance.
Inventors
- 👤 Robert B. Champ
- 👤 Robert L. Vollmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:35
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0661; C; C09; C09B; C09B57/00; C09B57/007; G03G5/0601; G03G5/0609; G03G5/0611
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
8 words
The non-mutagenic dye molecule 2,4-di-(o-hydroxy-p-pyrrolidino phenyl) cyclobutene diylium-1,3-diolate.
Claim 2
Dependent Claim
8 words
The non-mutagenic dye molecule 2,4-di-(o-hydroxy-p-pyrrolidino phenyl) cyclobutene diylium-1,3-diolate.
Claim 3
Dependent Claim
26 words
An electrophotographic photoconductor including a conductive base, and a charge transport charge generation layer means thereon containing the non-mutagenic charge generating molecule 2,4-di-(o-hydroxy-p-pyrrolidino phenyl) cyclobutene diylium-1,3-diolate.
Claim 4
Dependent Claim
26 words
An electrophotographic photoconductor including a conductive base, and a charge transport charge generation layer means thereon containing the non-mutagenic charge generating molecule 2,4-di-(o-hydroxy-p-pyrrolidino phenyl) cyclobutene diylium-1,3-diolate.
Claim 5
Dependent Claim
39 words
A photoconductor as claimed in claim 2 wherein said layer means comprises a charge generating layer on said conductive base, said charge generating layer containing said charge generating molecule, and a charge transport layer overcoating said charge generating layer.
Claim 6
Dependent Claim
15 words
A photoconductor as claimed in claim 3 wherein said charge generating layer contains a binder.
Claim 7
Dependent Claim
15 words
A photoconductor as claimed in claim 4 wherein said charge generating layer is an aggregate.
Claim 8
Dependent Claim
24 words
A xerographic photoconductor comprising a conductive substrate, a charge generation layer containing the generating molecule 2,4-di-(o-hydroxy-p-pyrrolidino phenyl) cyclobutene diylium-1,3-diolate, and a charge transport layer.
Claim 9
Dependent Claim
24 words
A xerographic photoconductor comprising a conductive substrate, a charge generation layer containing the generating molecule 2,4-di-(o-hydroxy-p-pyrrolidino phenyl) cyclobutene diylium-1,3-diolate, and a charge transport layer.
Claim 10
Dependent Claim
17 words
A photoconductor as claimed in claim 6 wherein said charge generating molecules are in an aggregate state.
References Cited (Backward Citations)
US3824099A
Cited
US4500621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |