US4629671A
Expired / Lapsed
US
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Charge-transporting compounds and photoconductive elements provided with such charge-transporting compounds
Assignee: Canon Production Printing Netherlands BV
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Filing: 1985-08-06
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Granted: 1986-12-16
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Expires: 2005-08-06
Abstract
Abstract Charge-transporting compounds which form substantially colorless layers having a minimal residual charge and a good cleanability are disclosed. These compounds are of the general formula: <IMAGE> wherein R1, R2, and R3, individually, represent a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms. Also disclosed is a photoconductive element containing a charge-generating compound and a charge-transporting compound of the general formula shown above which is homogeneously distributed in a binder. The charge-transporting compounds of the general formula are very soluble in various solvents and film-forming polymers providing for great maneuverability in processing the compounds into layers.
Inventors
- 👤 Roelof H. Everhardus
- 👤 Wilhelmus J. Bouts
- 👤 Johannes J. M. Brands
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:32
CPC Classifications
C; C07; C07D; C07D271/00; C07D271/02; C07D271/10; C07D271/107
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A photoconductive element comprising a support and one or more layers, containing together a "transparent and substantially colorless" charge-generating compound and a charge-transporting compound which is homogeneously distributed in a binder, wherein the charge-transporting compound is of the general formula: ##STR3## wherein R1, R2, and R3, individually, represent a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms.
Claim 2
Dependent Claim
61 words
A photoconductive element comprising a support and one or more layers, containing together a "transparent and substantially colorless" charge-generating compound and a charge-transporting compound which is homogeneously distributed in a binder, wherein the charge-transporting compound is of the general formula: ##STR3## wherein R1, R2, and R3, individually, represent a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms.
Claim 3
Dependent Claim
21 words
A photoconductive element as described in claim 1, wherein R1, R2, R3, individually, represent a hydrogen atom or a methyl group.
Claim 4
Dependent Claim
27 words
A photoconductive element as described in claim 1, wherein R1 and R2, individually, represent a methyl group in the para position and R3 represents a hydrogen atom.
Claim 5
Dependent Claim
62 words
A photoconductive element comprising a support, a charge-generating layer containing a charge-generating compound and a transparent and substantially colorless charge-transporting layer containing a charge-transporting compound which is homogeneously distributed in a binder, wherein the charge-transporting compound is of the general formula: ##STR4## wherein R1, R2 and R3, individually, represent a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms.
Claim 6
Dependent Claim
62 words
A photoconductive element comprising a support, a charge-generating layer containing a charge-generating compound and a transparent and substantially colorless charge-transporting layer containing a charge-transporting compound which is homogeneously distributed in a binder, wherein the charge-transporting compound is of the general formula: ##STR4## wherein R1, R2 and R3, individually, represent a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms.
Claim 7
Dependent Claim
22 words
A photoconductive element as described in claim 4, wherein R1, R2 and R3, individually, represent a hydrogen atom or a methyl group.
Claim 8
Dependent Claim
27 words
A photoconductive element as described in claim 5, wherein R1 and R2, individually, represent a methyl group in the para position and R3 represents a hydrogen atom.
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) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |