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:
Oct. 25, 1983
Filed:
Oct. 16, 1981
Ken Iwakura, Minami-ashigara, JP;
Nobuyoshi Sekikawa, Minami-ashigara, JP;
Akio Miyamoto, Fujinomiya, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A desensitizer composition containing the amidine derivative shown by following general formula can be effectively used for partially desensitizing a developer sheet of pressure-sensitive copying papers using diphenylamine series color formers: ##STR1## wherein R.sub.1 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 20 carbon atoms; R.sub.2 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an amino group, or an alkylthio group having 1 to 20 carbon atoms; and n is an integer of 2 to 6; said R.sub.1 and R.sub.2 may have a substituent and when both R.sub.1 and R.sub.2 are an alkyl group, at least one of R.sub.1 and R.sub.2 is an alkyl group having a substituent.