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. 16, 1999
Filed:
Mar. 18, 1998
Applicant:
Inventors:
Rupert Kraus, Waldsee, DE;
Martin Reif, Ludwigshafen, DE;
Bernd Bruchmann, Freinsheim, DE;
Helmut Tesch, Rodersheim-Gronau, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07K / ;
U.S. Cl.
CPC ...
560347 ;
Abstract
In a process for preparing isocyanates having a light color by reacting the corresponding amines with phosgene, the amines are treated with solid inorganic substances containing Lewis acid and/or Bronsted acid centers prior to the reaction with the phosgene.
Kraus, Rupert. (1999). Preparation of isocyanates having a light color (U.S. Patent No. 5872278). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5872278
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