The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1992
Filed:
Dec. 08, 1989
Applicant:
Inventors:
Yutaka Shikatani, Kawasaki, JP;
Naoki Kataoka, Kawasaki, JP;
Nobuyuki Kuroda, Yokohama, JP;
Kazuo Matsuura, Tokyo, JP;
Assignee:
Nippon Oil Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430 59 ; 564309 ;
Abstract
A hole transporting material is constituted by a compound represented by the following general formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5, which may be the same or different, are each independently hydrogen or a hydrocarbon residue having 1 to 20 carbon atoms; Ar.sup.1 and Ar.sup.2 are each independently a divalent hydrocarbon residue; l is an integer of 0 or more; m is an integer of 1 or more; and n is an integer of 2 or more.