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:
Feb. 17, 2009
Filed:
Dec. 13, 2002
Atsuhiko Ogura, Tsuchiura, JP;
Shinji Tanaka, Tsukuba, JP;
Yoshikazu Nakashima, Aichi, JP;
Shigeru Kitano, Kawasaki, JP;
Atsuhiko Ogura, Tsuchiura, JP;
Shinji Tanaka, Tsukuba, JP;
Yoshikazu Nakashima, Aichi, JP;
Shigeru Kitano, Kawasaki, JP;
NOF Corporation, Tokyo, JP;
Abstract
A novel A-B-Apolymer having a number average molecular weight of 10000 to 100000 is provided that has excellent bioabsorbability so as to disappear in a predetermined period of time even when embedded in a large amount in the body, has good kinetic properties, and is useful for preparing tissue anti-adhesion films. This polymer is composed of segments Aand Aeach having at least either of modified and unmodified amino acid groups, and segment B composed of PEG having a number average molecular weight of 8000 to 50000. The polymer contains both the modified and unmodified amino acid groups, the content of the modified amino acids is 20 to 85 mol % of all the amino acids in the polymer, and segment Ais bonded to one end of segment B and segment Ais bonded to the other end of segment B.