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:
Feb. 05, 1991
Filed:
May. 02, 1989
Applicant:
Inventors:
Wolfgang Schrott, Ludwigshafen, DE;
Peter Neumann, Mannheim, DE;
Michael Schmitt, Ludwigshafen, DE;
Sibylle Brosius, Mannheim, DE;
Klaus D Schomann, Ludwigshafen, DE;
Harald Kuppelhamier, Heidelberg, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ; C09B / ;
U.S. Cl.
CPC ...
560 25 ; 560 26 ; 560115 ; 560162 ; 560166 ; 560168 ; 260404 ; 2604045 ;
Abstract
Azulenesquaric acid dyes of the formula ##STR1## where L is substituted or unsubstituted C.sub.1 -C.sub.12 -alkylene,
Schrott, Wolfgang. (1991). Azulenesquaric acid dyes that contain urethane groups (U.S. Patent No. 4990649). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4990649
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile