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. 31, 1989
Filed:
Nov. 06, 1987
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A silver halide photographic material which comprises a support having provided thereon at least one photosensitive silver halide photographic emulsion layer, wherein the emulsion layer or at least one of the other hydrophilic colloid layers contains at least one of alkynyl-substituted heterocyclic quaternary ammonium salts represented by the formula: ##STR1## wherein Z represents a group of non-metallic atoms required to form a 5- to 6-membered heterocyclic ring, R.sup.1 represents an aliphatic group, R.sup.2, R.sup.3 and R.sup.4, which may be the same or different, each represents a hydrogen atom, an aliphatic group, or an aromatic group, at least one of R.sup.1, R.sup.2, R.sup.3, R.sup.4 and Z has at least one substituent having an alkynyl group, Y represents a counter ion for the charge balance, and n is a number required for charge balance.