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:
Apr. 29, 2008
Filed:
Dec. 12, 2005
Hans-peter Brack, Herrliberg, CH;
Maarten Antoon Jan Campman, Roosendaal, CH;
Laurus Van Der Wekke, Rucphen, NL;
Dennis James Patrick Maria Willemse, Roosendaal, NL;
Hans-Peter Brack, Herrliberg, CH;
Maarten Antoon Jan Campman, Roosendaal, CH;
Laurus van der Wekke, Rucphen, NL;
Dennis James Patrick Maria Willemse, Roosendaal, NL;
Other;
Abstract
A surface of a melt polymerization reactor system having residual reaction components of a melt polymerization reaction thereon can be cleaned by introducing a cleaning agent having a phenolic compound to the polymerization reactor system and into contact with the surface of the melt polymerization reactor system having the residual reaction components of a melt polymerization reaction thereon. The residual reaction components of the melt polymerization reaction include polycarbonate oligomers or polymers or their degradation products. Further, the cleaning agent is maintained in contact with the surface for a period of time and at a temperature sufficient to substantially remove the residual reaction components from the surface.