IP Library Granted Patent US 8,173,338
Granted Patent B2
US 8,173,338 · App. 12/369,454 · Granted May 8, 2012

Photoconductor system for electrophotographic device

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Quick Facts
Patent No.
US 8,173,338
App. No.
12/369,454
Granted
May 8, 2012
Kind
B2
Abstract

An electrophotographic photoconductor system for use in an electrophotographic device and method of using the same. The electrophotoconductor system comprises an electroconductive support, a charge generation layer disposed on the electroconductive support, and a charge transport layer disposed on the charge generation layer. The charge generation layer includes a photosensitive material comprising titanyl phthalocyanine, and at least one oligomeric phenylene additive. The electrophotographic photoconductor system is capable of absorbing light having a wavelength of about 350 nm to about 850 nm.

Claims (8)

1. A charge generation layer for an electrophotographic device, the charge generation layer comprising:

a photosensitive material comprising type IV titanyl phthalocyanine; and

at least one oligomeric phenylene additive including quaterphenyls,

wherein the charge generation layer absorbs light having a wavelength of about 350 nm to about 850 nm.

2. The charge generation layer of claim 1 further comprising at least one binder.

3. The charge generation layer of claim 2 wherein the at least one binder is a binder resin selected from the group consisting of polycarbonate resins, polyester resins, polyarylate resins, butyral resins, polystyrene resins, poly (vinyl acetal) resins, diallyl phthalate resins, acrylic resins, methacrylic resins, vinyl acetate resins, phenol resins, silicone resins, polysulfone resins, styrene-butadiene resins, alkyd resins, epoxy resins, urea resins, vinyl chloride-vinyl acetate resins and combinations thereof.

4. The charge generation layer of claim 1 wherein the at least one oligomeric phenylene additive further includes biphenyls, terphenyls, or combinations thereof.

5. The charge generation layer of claim 4 wherein the at least one oligomeric phenylene additive further includes meta-terphenyl, ortho-terphenyl or a combination thereof.

Assignments (8)
SECURITY INTEREST Recorded Jan 5, 2026
From: LEXMARK INTERNATIONAL, INC.
To: BANK TRUST COMPANY, NATIONAL ASSOCIATION
Reel/Frame 074202/0192 →
SECURITY INTEREST Recorded Jan 5, 2026
From: LEXMARK INTERNATIONAL, INC.
To: BANK TRUST COMPANY, NATIONAL ASSOCIATION
Reel/Frame 074202/0293 →
SECURITY INTEREST Recorded Sep 23, 2025
From: LEXMARK INTERNATIONAL, INC.
To: CITIBANK, N.A.
Reel/Frame 073007/0118 →
SECURITY INTEREST Recorded Sep 23, 2025
From: LEXMARK INTERNATIONAL, INC.
To: JEFFERIES FINANCE LLC
Reel/Frame 073007/0346 →
RELEASE OF SECURITY INTEREST Recorded Jan 18, 2024
From: CHINA CITIC BANK CORPORATION LIMITED, GUANGZHOU BRANCH, AS COLLATERAL AGENT
To: LEXMARK INTERNATIONAL, INC.
Reel/Frame 066345/0026 →
CORRECTIVE ASSIGNMENT TO CORRECT THE INCORRECT U.S. PATENT NUMBER PREVIOUSLY RECORDED AT REEL: 046989 FRAME: 0396. ASSIGNOR(S) HEREBY CONFIRMS THE PATENT SECURITY AGREEMENT. Recorded Oct 24, 2018
From: LEXMARK INTERNATIONAL, INC.
To: CHINA CITIC BANK CORPORATION LIMITED, GUANGZHOU BRANCH, AS COLLATERAL AGENT
Reel/Frame 047760/0795 →
PATENT SECURITY AGREEMENT Recorded Aug 30, 2018
From: LEXMARK INTERNATIONAL, INC.
To: CHINA CITIC BANK CORPORATION LIMITED, GUANGZHOU BRANCH, AS COLLATERAL AGENT
Reel/Frame 046989/0396 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 11, 2009
From: BELLINO, MARK THOMAS; LUO, WEIMEI; REEVES, SCOTT DANIEL; THAMES, TANYA YVONNE
To: LEXMARK INTERNATIONAL, INC.
Reel/Frame 022244/0599 →