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:
Jan. 27, 1976
Filed:
Jan. 21, 1974
Applicant:
Inventor:
Hans Altermatt, Reinach, CH;
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
260249 ; 8 542 ; 8 36 ; 8 21 / ;
Abstract
Vat dyestuffs of the formula ##EQU1## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom or a low molecular alkyl radical and A.sub.1 and A.sub.2 represent a different or similar vattable radical with 3 to 6 condensed rings, are suitable for dyeing and printing the most varied materials, in particular for dyeing and printing fibres made from natural or regenerated cellulose in the presence of a reducing agent.