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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.:

US 8394912 B1

PDFFull Text
Date of Patent:
Mar. 12, 2013

Filed:

Dec. 20, 2010

Process and apparatus for the preparation of polycarbonate

Applicants:

Frank Doebert, Shanghai, CN;

Andreas Stremmel, Willich, DE;

Christoph Biedron, Moers, DE;

Stephan Laue, Antwerpen, BE;

Johann Rechner, Kerpen, DE;

Torsten Hagen, Essen, DE;

Frank Bruynseels, Sint Gillis, BE;

Frank Quaeyhaegens, Schoten, BE;

Johan Decloedt, Hulst, NL;

Paul Van Dorst, Merksplas, BE;

Uwe Arndt, Ekeren, BE;

Johan Vanden Eynde, Zwijnaarde, BE;

Ursula Tracht, Leverkusen, DE;

Thomas König, Leverkusen, DE;

Ulrich Liesenfelder, Bergisch Gladbach, DE;

Inventors:

Frank Doebert, Shanghai, CN;

Andreas Stremmel, Willich, DE;

Christoph Biedron, Moers, DE;

Stephan Laue, Antwerpen, BE;

Johann Rechner, Kerpen, DE;

Torsten Hagen, Essen, DE;

Frank Bruynseels, Sint Gillis, BE;

Frank Quaeyhaegens, Schoten, BE;

Johan Decloedt, Hulst, NL;

Paul Van Dorst, Merksplas, BE;

Uwe Arndt, Ekeren, BE;

Johan Vanden Eynde, Zwijnaarde, BE;

Ursula Tracht, Leverkusen, DE;

Thomas König, Leverkusen, DE;

Ulrich Liesenfelder, Bergisch Gladbach, DE;

Assignee:

Bayer MaterialScience AG, , DE;

Attorney:

Novak Druce Connolly Bove + Quigg LLP

Primary Examiner:

Terressa Boykin

Int. Cl.
CPC ...
C08G 63/02 (2006.01); C08G 64/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

The invention relates to a process for the pretreatment of material surfaces in order to minimize the interaction between polycarbonate and metal and, in the processing and synthesis of polycarbonate, to obtain a high-quality polymer which in particular does not become discolored and is free of insoluble constituents.

Find Patent Forward Citations

Doebert, Frank. (2013). Process and apparatus for the preparation of polycarbonate (U.S. Patent No. 8394912). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8394912

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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