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:
Mar. 30, 2004
Filed:
Apr. 11, 2001
Applicant:
Inventors:
Tomohiro Maekawa, Niihama, JP;
Kenji Manabe, Niihama, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 4/776 ;
U.S. Cl.
CPC ...
B29C 4/776 ;
Abstract
A process for producing an article of resin made from at least about 50% by weight of methyl methacrylate is provided, which comprises a step of melt-processing the resin with an extruder, wherein an oxygen concentration of a gaseous phase in a resin feed zone of the extruder falls within a range of from about 0.7% by volume to about 10% by volume. The article is excellent in curbing the coloring in melt processing.