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:
Jul. 12, 1977
Filed:
Dec. 03, 1975
Applicant:
Inventors:
Paolo Beretta, Ferrania (Savona), IT;
Luigi Magnani, Carcare (Savona), IT;
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
96127 ; 96101 ; 96139 ; 96140 ; 2602401 ;
Abstract
Quaternated merocyanine dyes for spectrally sensitizing direct positive silver halide emulsions having a first heterocyclic nucleus selected from the group consisting of a 2-isoxazolin-3-furyl-5-one, a 2-isoxazolin-3-thienyl-5-one, a 2-isoxazolin-3-pyrryl-5-one, a 2-pyrazolin-3-furyl-5-one, a 2-pyrazolin-3-thienyl-5-one and a 2-pyrazolin-3-pyrryl-5-one nucleus, linked at the 4-carbon atom thereof through a methine chain to a second heterocyclic nucleus for completing the said quaternated merocyanine dye.