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:
Apr. 17, 1979
Filed:
Feb. 28, 1977
Applicant:
Inventors:
Assignee:
Fidelity Union Trust Company, Executive Trustee under Sandoz Trust, Newark, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
D21D / ; D21H / ; D21H / ;
U.S. Cl.
CPC ...
8 85 / ; 8-7 ; 8 85 / ; 8 86 ; 8194 ; 162162 ; 260153 ; 260158 ; 260162 ; 260167 ; 260173 ; 260175 ; 260182 ; 260183 ; 260184 ; 260187 ;
Abstract
Concentrated, liquid preparations of metal-free direct azo dyes, which contain in each instance 1 part by weight of dye, 1 to 8 parts by weight of water, and 0.5 to 5 or preferably 0.5 to 2 parts by weight of an amide are useful for dyeing paper in the stock and for dyeing paper sheet.
Frei, Alfred. (1979). Concentrated aqueous dye compositions containing a low molecular weight (U.S. Patent No. 4149851). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4149851
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile