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. 16, 1976
Filed:
Dec. 17, 1973
Applicant:
Inventors:
Gerald D Burt, Shaker Heights, OH (US);
Anton Mudrak, Broadview Heights, OH (US);
Assignee:
The Harshaw Chemical Company, Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C09B / ; C09B / ; C09B / ;
U.S. Cl.
CPC ...
260186 ; 260180 ; 260205 ; 260206 ; 260207 ; 2602071 ; 260208 ; 260379 ; 2605 / ; 260575 ; 260591 ;
Abstract
Organic dyes or dye intermediates are crystallizable in an aqueous medium in the presence of finely divided, solid polytetrafluoroethylene (hereinafter referred to as 'PTFE') resin particles. Crystals of desirable, very small size are precipitated more quickly than with conventional seeding. This process is particularly useful for crystallizing disperse dyes of two types: