US3852208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive toner composition
Assignee: Canon Inc
•
Filing: 1972-12-13
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Granted: 1974-12-03
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Expires: 1992-12-13
Abstract
Abstract A light-transparent photoconductive material for use in electrophotography is the reaction product obtained by condensing A. AN ORGANIC PHOTOCONDUCTIVE COMPOUND CONTAINING AN AMINO AND/OR HYDROXYL GROUP AND B. A REACTIVE COLORED COMPOUND CONTAINING AN ACTIVE HALOGEN ATOM; OR BY CONDENSING A. AN ORGANIC PHOTOCONDUCTIVE COMPOUND CONTAINING AN ACTIVE HALOGEN ATOM AND B. A REACTIVE COLORED COMPOUND CONTAINING AN AMINO AND/OR HYDROXYL GROUP.
Inventors
- 👤 S Nagashima
- 👤 K Tsuchiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:55
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B39/00; C09B43/00; C09B43/32; C09B62/00; C09B62/02; C09B62/04; G; G03; G03G; G03G17/00; G03G17/04; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06144; G03G5/06149; G03G5/0618; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0629; G03G5/0631; G03G5/0633; G03G5/0635; G03G5/0637; G03G5/064; G03G5/0644; G03G5/0661; G03G5/0664; G03G5/0675; G03G5/0677; G03G5/0679; G03G5/12; G03G9/00; G03G9/08; G03G9/09; G03G9/0926; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/101
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
71 words
IN A TONER FOR DEVELOPING AN ELECTROSTATIC LATENT IMAGE. THE IMPROVEMENT WHICH COMPRISES THAT THE EFFECTIVE COMPONENT OF THE TONER IS THE REACTION PRODUCT OBTAINED BY CONDENSING A. AN ORGANIC PHOTOCONDUCTIVE COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOTOCONDUCTIVE POLYCYCLIC AROMATIC COMPOUNDS HAVING AN AMINO SUBSTITUENT, AND PHOTOCONDUCTIVE POLYCYCLIC AROMATIC COMPOUNDS HAVING AN HYDROXYL SUBSTITUENT, AND B. A COLORED SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS 35-44 OF THE SPECIFICATION.
Claim 2
Dependent Claim
71 words
IN A TONER FOR DEVELOPING AN ELECTROSTATIC LATENT IMAGE. THE IMPROVEMENT WHICH COMPRISES THAT THE EFFECTIVE COMPONENT OF THE TONER IS THE REACTION PRODUCT OBTAINED BY CONDENSING A. AN ORGANIC PHOTOCONDUCTIVE COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOTOCONDUCTIVE POLYCYCLIC AROMATIC COMPOUNDS HAVING AN AMINO SUBSTITUENT, AND PHOTOCONDUCTIVE POLYCYCLIC AROMATIC COMPOUNDS HAVING AN HYDROXYL SUBSTITUENT, AND B. A COLORED SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS 35-44 OF THE SPECIFICATION.
Claim 3
Dependent Claim
27 words
In a toner for developing an electrostatic latent image, the improvement which comprises that the effective component of the toner is the reaction product obtained by condensing
Claim 4
Dependent Claim
27 words
In a toner for developing an electrostatic latent image, the improvement which comprises that the effective component of the toner is the reaction product obtained by condensing
Claim 5
Dependent Claim
31 words
A material as claimed in claim 2, wherein compound (a) is the compound of formula (1) of the specification while compound (b) is the compound of formula (3) of the specification.
References Cited (Backward Citations)
US3060180A
Cited
US2671786A
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US2986521A
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US3261826A
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GB1055321A
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US3560360A
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US3681107A
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US3577444A
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US3730711A
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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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |