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:
Jul. 03, 2001
Filed:
Dec. 23, 1997
Applicant:
Inventors:
C. Mauli Agrawal, San Antonio, TX (US);
Kyriacos A. Athanasiou, San Antonio, TX (US);
Assignee:
Board of Regents of the University of Texas System, Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J 9/26 ; C08J 9/28 ;
U.S. Cl.
CPC ...
C08J 9/26 ; C08J 9/28 ;
Abstract
The present invention involves compositions having variable permeation and/or porosity and objects made therefrom. The compositions are prepared by dispersing a pore-forming agent in a polymer matrix by agitation. The composition is density developed resulting in a variable concentration in pore-forming agent throughout the mixture through application of an external force on the mixture with or without continued agitation. The pore-forming agent is then leached from the mixture to form a polymer matrix having variable permeability and/or porosity.