Patent US2235677A successfully refreshed from Google Patents.
Patent US3660086A successfully refreshed from Google Patents.
← Back to Patent Explorer
US3660086A Expired / Lapsed US ⏱️ 0.0 years remaining

Electrophotographic plate and process employing inorganic photoconductive material with a photochromic sensitizing agent

Assignee: Xerox Corp
•
Filing: 1970-01-02
•
Granted: 1972-05-02
•
Expires: 1990-01-02
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract An electrophotographic plate which comprises a photoconductive layer comprising a photoconductive material, a binder material, and a photochromic sensitizing agent selected from the group consisting of: WHEREIN: R1 H, a halogen, R or OR where R is an alkyl group having one to seven carbon atoms, R2 and R3 an alkyl group having one to seven carbon atoms, and R4 (CH2)n SO3H or (CH2)n COOH, where n 1 to 7; WHEREIN: R1 R, a halogen, R or OR where R is an alkyl group having one to seven carbon atoms, R2 and R3 an alkyl group having one to seven carbon atoms, R4 (CH2)n SO3H or (CH2)n COOH where n 1 to 7, and R5 and R6 H, NO2, a halogen, CN, OR, or COOR where R is an alkyl group having one to seven carbon atoms, providing R5 and R6 do not represent H atoms simultaneously; AND MIXTURES THEREOF, IS DISCLOSED. Electrophotographic processes employing these plates are also disclosed.

Inventors

  • 👤 Yasuo Tamai
  • 👤 Chiaki Osada
  • 👤 Hisatake Ono
  • 👤 Satoru Honjo

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 16:45
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/09

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 21 words
The member as disclosed in claim 1 wherein said photochromic sensitiZing agent is the open form of the respective sensitizing material.
Claim 2
Dependent Claim 21 words
The member as disclosed in claim 1 wherein said photochromic sensitizing agent is the closed form of the respective sensitizing material.
Claim 3
Dependent Claim 29 words
The member as disclosed in claim 1 wherein said inorganic photoconducting material is selected from at least one member of the group consisting of zinc oxide and titanium oxide.
Claim 4
Dependent Claim 15 words
The plate as disclosed in claim 4 wherein said inorganic photoconductive material comprises zinc oxide.
Claim 5
Dependent Claim 22 words
The member as disclosed in claim 1 wherein said photoconductive layer has a thickness of from about 5 to about 200 microns.
Claim 6
Dependent Claim 41 words
The photoconductive member as disclosed in claim 1 wherein said sensitizing agent and said photoconductive material are present in amounts ranging from about 1-1,000 parts by weight of said sensitizing agent to about 100,000 parts by weight of said photoconductive material.
Claim 7
Dependent Claim 29 words
The member as disclosed in claim 7 wherein said range comprises 1-20 parts by weight of said sensitizing agent to about 10,000 parts by weight of said photoconductive material.
Claim 8
Dependent Claim 40 words
An electrophotographic imaging process which comprises: a. providing an electrophotographic member of the nature described in claim 1, b. forming an electrostatic latent image on the surface of said plate, and c. developing said latent image with electroscopic developing materials.
Claim 9
Dependent Claim 21 words
The process as disclosed in claim 9 further including the step of the uniformly exposing said developed member to visible light.
Claim 10
Dependent Claim 19 words
The process as disclosed in claim 9 wherein said photochromic sensitizing agent is the open form of said agent.
Claim 11
Dependent Claim 19 words
The process as disclosed in claim 9 wherein said photochromic sensitizing agent is the closed form of said agent.
Claim 12
Dependent Claim 29 words
The process as disclosed in claim 9 wherein said inorganic photoconductive material is selected from at least one member of the group consisting of zinc oxide and titanium oxide.
Claim 13
Dependent Claim 15 words
The process as disclosed in claim 13 wherein said inorganic photoconductive material comprises zinc oxide.

References Cited (Backward Citations)

US3445225A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-05-02 1975-11-01 1976-05-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-05-02 1979-11-01 1980-05-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-05-02 1983-11-01 1984-05-02 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag