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:
Aug. 31, 2010
Filed:
Jan. 25, 2008
Kazuhiro Okamura, Sanda, JP;
Kazuhiro Okamura, Sanda, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
A polyvinylpyrrolidone powder composition including polyvinylpyrrolidone with a K value of not lower than 50 and not higher than 120, wherein a content of insoluble substances remaining on a membrane filter having a pore size of 1.2 μm when a 2 wt % aqueous solution of the composition is filtered with the filter is not higher than 70 ppm; a polyvinylpyrrolidone powder composition including polyvinylpyrrolidone with a K value of not lower than 50 and not higher than 120, wherein a K value lowering ratio to be observed when the composition is heated at 80° C. in air for 14 days is not higher than 12%; and a polyvinylpyrrolidone powder composition including polyvinylpyrrolidone with a K value of not lower than 50 and not higher than 120, wherein a content of insoluble substances remaining on a membrane filter having a pore size of 1.2 μm when a 2 wt % aqueous solution of the composition is filtered with the filter is not higher than 70 ppm, and a K value lowering ratio to be observed when the composition is heated at 80° C. in air for 14 days is not higher than 12%.
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