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:
Sep. 14, 1999
Filed:
Aug. 04, 1997
Shun-ichiro Yamanaka, Hirakata, JP;
Kazuaki Sukata, Yawata, JP;
Orient Chemical Industries, Ltd., Osaka, JP;
Abstract
Charge control agent and toner for developing electrostatic images comprising such a charge control agent whose active ingredient is a calix (n) arene compound of formula I: ##STR1## wherein x+y=n; x and y each is an integer of 1 or more; n is an integer of 4-8; the x repeat units and y repeat units can be arranged in any order; R.sup.1 and R.sup.2 each is H, C.sub.1-12 alkyl, C.sub.2-12 alkenyl, C.sub.7-12 aralkyl, phenyl, C.sub.4-8 cycloalkyl, halogen, nitro, amino, alkyl- or phenyl-substituted amino, --Si(CH.sub.3).sub.3, or --SO.sub.3 H; and of the n R radicals in the --OR groups, 1 to (n-1) are H, with the remaining (n-1) to 1 being alkyl, alkenyl, phenyl, aralkyl, cycloalkyl, --COR.sup.3 �wherein R.sup.3 is H, alkyl, alkenyl, phenyl, aralkyl, or cycloalkyl!, --Si(CH.sub.3).sub.3, --(CH.sub.2).sub.m COOR.sup.4 �wherein R.sup.4 is H or lower alkyl and m is an integer of 1-3!, --(CH.sub.2 CH.sub.2 O).sub.r H �wherein r is an integer of 1-10!, or ##STR2##