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, 1990
Filed:
Oct. 03, 1984
Applicant:
Inventors:
Dieter Reinehr, Kandern, DE;
Alwyn Spencer, Basel, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07D / ;
U.S. Cl.
CPC ...
558401 ; 546255 ; 549563 ; 560-8 ; 560 81 ; 568325 ; 568661 ; 570184 ; 564161 ;
Abstract
Novel compounds of the formula ##STR1## and processes for their preparation are described. X represents bromine or iodine and R.sub.1, R.sub.2 and R.sub.3 have the meaning indicated in the patent claim. The compounds (I) are valuable intermediates for the preparation of fluorescent brighteners of the divinylstilbene type.
Quick Actions:
Reinehr, Dieter. (1990). 4-halogenostilbene derivatives and processes for their preparation (U.S. Patent No. 4918215). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4918215
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile