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. 27, 1987
Filed:
Feb. 24, 1986
Minoru Ohashi, Nagaokakyo, JP;
Satoshi Kaneko, Nagaokakyo, JP;
Mitsubishi Paper Mills, Ltd., Tokyo, JP;
Abstract
Disclosed are novel antifoggant precursors having the general formula (I) or (II) which are sufficiently stable in a wealkyl acidic medium, are markedly effective in restraining over-development fog and besides cause little loss of sensitivity: ##STR1## (wherein Y represents oxygen atom or ##STR2## X represents OR.sub.3 when Y is oxygen atom and R.sub.3 when Y is ##STR3## where R.sub.1 and R.sub.2 each represents hydrogen atom, alkyl group aryl group and R.sub.3 represents hydrogen atom, alkyl group or phenyl group; R.sub.4 -R.sub.6 each represent hydrogen atom, halogen atom, alkyl group, carboxyl group, alkoxycarbonyl group or phenyl group, R.sub.4 and R.sub.5 may form together a benzene ring; R.sub.7 represents hydrogen atom, alkyl group or phenyl group; and A represents a heterocyclic group of the mercapto antifoggant.) ##STR4## (wherein X, Y, R.sub.4 -R.sub.5 and A are the same as defined for the general formula (I) and R.sub.4 and R.sub.5 or R.sub.5 and R.sub.6 may form together a benzene ring.).