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:
Jun. 29, 1999
Filed:
Dec. 18, 1997
Applicant:
Inventors:
Assignees:
The Institute of Physical and Chemical Research, Saitama, JP;
Akebono Research and Development Center Ltd., Saitama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; C08G / ;
U.S. Cl.
CPC ...
528328 ; 435132 ; 435135 ; 435136 ; 435146 ;
Abstract
Poly(3-hydroxybutanoic acid) having a number average molecular weight of not less than 500,000 is oriented at a draw ratio of 2-fold or more to reproducibly obtain a film made of poly(3-hydroxybutanoic acid) having biodegradability and biocompatibility as well as sufficient strength and flexibility (for example, tensile strength of not less than 30 MPa and elongation to break of not less than 15%).