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:
Aug. 27, 2013
Filed:
Sep. 08, 2008
Applicants:
Thomas Kissel, Staufen, DE;
Xiaoying Wang, Guangzhou, CN;
Inventors:
Thomas Kissel, Staufen, DE;
Xiaoying Wang, Guangzhou, CN;
Assignee:
Evonik Roehm GmbH, Darmstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
A61K 9/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to graft copolymers of polyvinyl sulfonic-co-vinyl alcohol)-g-poly(lactide-co-glycolide) (P(VS-VA)-g-PLGA) with negatively charged electrolyte properties, their method of preparation and their use. These negatively charged graft copolymers are suitable for effective loading and sustained-release of especially positively charged drugs, proteins and peptides, and drug-loaded particles from these grafted co-polymers are especially useful as parenteral or mucosal drug delivery systems for pharmaceutical applications.