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:
May. 16, 1978
Filed:
Feb. 10, 1977
Applicant:
Inventor:
Peter Mockli, Basel, CH;
Assignee:
Ciba-Geigy AG, Basel, CH;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
8-7 ; 8 1 / ; 8177 / ; 162162 ;
Abstract
A process for the dyeing of paper material from an aqueous medium, comprising the use of at least one water-soluble dye of the formula ##STR1## wherein Py represents a pyridyl group of the formula ##STR2## R.sub.1 represents lower alkyl, substituted lower alkyl, allyl, or benzyl, R.sub.2 represents hydrogen, halogen, methyl or ethyl,