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:
Oct. 19, 1999
Filed:
Dec. 05, 1997
Applicant:
Inventors:
Jorge Heller, Woodside, CA (US);
Steven Y Ng, San Francisco, CA (US);
Assignee:
Advanced Polymer Systems, Inc., Redwood City, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F / ; C08G / ;
U.S. Cl.
CPC ...
424425 ; 528220 ; 528271 ; 528354 ; 528392 ; 528403 ; 528406 ; 528425 ; 424422 ; 424426 ; 424486 ;
Abstract
Polymers useful as orthopedic implants or vehicles for the sustained delivery of pharmaceutical, cosmetic and agricultural agents are prepared in such a manner that the rate and degree to which they are hydrolyzed can be controlled without addition of exogenous acid. This control results from the incorporation of esters of short-chain .alpha.-hydroxy acids such as esters of glycolic acid, lactic acid or glycolic-co-lactic acid copolymer into the polymer chain and variation of the amount of these esters relative to the polymer as a whole.