Claims for Patent: 4,728,721

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Summary for Patent: 4,728,721

Title:	Polymer, production and use thereof
Abstract:	The present invention provides a biodegradable high molecular polymer characterized in that the content of water-soluble low molecular compounds, as calculated on the assumption that said compounds each is a monobasic acid, is less than 0.01 mole per 100 grams of said high molecular polymer. The thus-obtained molecular polymer has good aging stability and can be used advantageously as an excipient for pharmaceutical preparations.
Inventor(s):	Masaki Yamamoto, Hiroaki Okada, Yasuaki Ogawa, Tsutomu Miyagawa
Assignee:	Takeda Pharmaceutical Co Ltd, Fujifilm Wako Pure Chemical Corp
Application Number:	US06/858,040
Patent Claims:

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