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:
Mar. 13, 1984
Filed:
Nov. 29, 1982
Applicant:
Inventors:
Assignee:
Racon Incorporated, Wichita, KS (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
252 68 ; 62114 ; 260378 ;
Abstract
1,4-Bis(2,4,6-trialkylanilino)anthraquinone wherein the alkyls on each anilino group are selected from the group consisting of methyl and ethyl and one of the three alkyls on each anilino group is different from the other two, e.g. 1,4-bis(2,6-diethyl-4-methylanilino)anthraquinone, is disclosed as an unusually effective blue dye suitable for use as a visual leak indicator in halocarbon refrigerants or in refrigeration liquids comprising a halocarbon refrigerant in admixture with a refrigeration oil.