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. 01, 1984
Filed:
Dec. 09, 1981
Applicant:
Inventor:
Fritz Graser, Ludwigshafen, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
546 37 ;
Abstract
Novel perylene-3,4,9,10-tetracarboxylic acid diimides of the formula ##STR1## where R.sup.1 and R.sup.2 are each isopropyl or R.sup.1 is methyl or ethyl and R.sup.2 is C.sub.3 - or C.sub.4 -alkyl, give clear, luminous, very lightfast, fluorescent orange colorations in plastics. The dyes are particularly suitable for concentrating light.
Graser, Fritz. (1984). Perylenetetracarboxylic acid diimides and their use (U.S. Patent No. 4446324). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4446324
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile