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. 17, 1976
Filed:
Sep. 24, 1974
Applicant:
Inventors:
Alfred Horbach, Krefeld, DT;
Hugo Vernaleken, Krefeld-Bockum, DT;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DT;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
260 / ; 210 24 ; 260 / ; 260D / ;
Abstract
The contaminating inorganic compounds such as alkali metal salts or alkali metal hydroxides which remain in a polycarbonate solution prepared by reacting phosgene with a dihydroxy-aryl compound are removed by contacting the solution with a molecular sieve.