US3954467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photosensitive material
Assignee: Fujifilm Holdings Corp
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Filing: 1971-10-29
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Granted: 1976-05-04
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Expires: 1991-10-29
Abstract
Abstract An electrophotographic photosensitive material having an electrophotosensitive layer comprising a finely divided inorganic photoconductive material, a sensitizing dye for the photoconductive material and a resinous binder on a support and to be subjected to bleaching treatment after the formation of a visible image to remove the coloration with the sensitizing dye from the electrophotosensitive layer with a solution containing an organic acid or an alkali metal hydroxide, which comprises the resinous binder being crosslinked with polyisocyanate to be rendered insoluble in an organic solvent.
Inventors
- 👤 Masaaki Takimoto
- 👤 Satoru Honjo
- 👤 Yasuo Tamai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:40
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/622; C08G18/6225; C08G18/42; C08G18/4291; C08G18/58; G; G03; G03G; G03G5/00; G03G5/005; G03G5/02; G03G5/04; G03G5/05; G03G5/0525; G03G5/0528; G03G5/0592
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
53 words
An electrophotographic photosensitive material having an electrophotosensitive layer comprising a finely-divided inorganic photoconductive material, a sensitizing dye for said photoconductive material and a resinous binder having an acid component with an aromatic nucleus on a support which comprises said resinous binder being crosslinked with polyisocyanate to be rendered insoluble in an organic solvent.
Claim 2
Dependent Claim
53 words
An electrophotographic photosensitive material having an electrophotosensitive layer comprising a finely-divided inorganic photoconductive material, a sensitizing dye for said photoconductive material and a resinous binder having an acid component with an aromatic nucleus on a support which comprises said resinous binder being crosslinked with polyisocyanate to be rendered insoluble in an organic solvent.
Claim 3
Dependent Claim
26 words
An electrophotographic photosensitive material as claimed in claim 1, wherein said resinous binder comprising a alkyd resin having hydroxy radical capable of reacting with isocyanate radical.
Claim 4
Dependent Claim
24 words
An electrophotographic photosensitive material as claimed in claim 1 wherein said resinous binder comprising an epoxy ester of fatty acid of dehydrated castor oil.
Claim 5
Dependent Claim
20 words
An electrophotographic photosensitive material as claimed in claim 1, wherein said resinous binder comprising a vinyl polymer containing hydroxy radical.
Claim 6
Dependent Claim
31 words
A material as in claim 1 where said photoconductive material is zinc oxide and said sensitizing dye is present in the amount of 0.02 parts per 100 parts of zinc oxide.
References Cited (Backward Citations)
US3025160A
Cited
US3403019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |