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:
Jan. 25, 2005
Filed:
Aug. 24, 2000
Hiroyuki Imanishi, Settsu, JP;
Yoshiyuki Hiraga, Settsu, JP;
Masayuki Namimatsu, Settsu, JP;
Satoshi Komatsu, Settsu, JP;
Hiroyuki Imanishi, Settsu, JP;
Yoshiyuki Hiraga, Settsu, JP;
Masayuki Namimatsu, Settsu, JP;
Satoshi Komatsu, Settsu, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
After a melt-processable fluorine-containing copolymer is heated and molten, the copolymer is reheatd in a closed apparatus under a non-static condition at a temperature of, for example, 130° C. to the melting point of the fluorine-containing polymer, whereby a content of volatile materials in the copolymer is reduced to 30% or less of an initial content of volatile materials. Thereby, the content of volatile materials in the melt-processable fluorine-containing copolymer, which has been once molten, can be effectively decreased without using a large apparatus while avoiding the contamination of the copolymer with foreign particles.