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:
Jul. 05, 2016
Filed:
Nov. 12, 2008
Applicants:
Herbert Stutz, Dormagen, DE;
Reinhard Halpaap, Odenthal, DE;
Tilak Suren Lewkebandara, Webster, TX (US);
Inventors:
Herbert Stutz, Dormagen, DE;
Reinhard Halpaap, Odenthal, DE;
Tilak Suren Lewkebandara, Webster, TX (US);
Assignees:
Covestro Deutschland AG, Leverkusen, DE;
Covestro LLC, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 263/10 (2006.01);
U.S. Cl.
CPC ...
C07C 263/10 (2013.01);
Abstract
The invention relates to the preparation of isocyanates by phosgenation of amines in the gas phase, with these isocyanates having a comparatively low proportion of color-imparting compounds.