Process for treatment of metal surfaces

United States of America Patent

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Mar 8, 2011
Grant Date
Sep 4, 2008
app pub date
Oct 25, 2007
filing date
Oct 31, 2006

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Abstract

A process for treating the working surfaces of equipment used in the production and processing of polycarbonate is disclosed. The thermal treatment in an oxidative atmosphere results in resin and molded articles having improved optical quality.

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Patent Owner(s)

Patent Owner	Address
COVESTRO DEUTSCHLAND AG	KAISER-WILHELM-ALLEE 60 51373 LEVERKUSEN 51373

International Classification(s)

C13K:GLUCOSE; INVERT SUGAR; LACTOSE; MALTOSE; SYNTHESIS....

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Inventor Name	Address	# of filed Patents	Total Citations
Ebert, Wolfgang	Krefeld, DE	115	736
Karbach, Alexander	Krefeld, DE	27	316
Mellis, Rainer	Baytown, US	6	57
Meyer, Alexander	Duesseldorf, DE	104	402
Michalski-Vollmer, Delef	Leverkusen, DE	1	3
Ruytinx, Bert	Halen, BE	8	37

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Process for treatment of metal surfaces

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United States of America Patent

11977598

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PATENT NO	7901467
APP PUB NO	20080210343A1
SERIAL NO	11977598
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
March 08, 2011	US,7901467,B2 US7901467B2	GRANTED PATENT AS SECOND PUBLICATION
September 04, 2008	US,20080210343,A1 US20080210343A1	FIRST PUBLISHED PATENT APPLICATION

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11977598

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