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. 27, 2001
Filed:
Oct. 28, 1998
Atul J. Shukla, Cordova, TN (US);
Other;
Abstract
Biodegradable delivery systems of physiologically, pharmacologically and biologically active substance(s) (BAS) are provided. These systems are obtained by incorporating the BAS into a blend of biodegradable polymers and plasticizers using a novel solvent evaporation method. This method involves dissolving the biodegradable polymer or copolymer and a plasticizer into a volatile solvent. The BAS may then be added to this mixture. The volatile solvent is removed using vacuum or at an elevated temperature or using a combination of both vacuum and elevated temperature. The resultant mixture is a BAS-loaded formulation which when injected, implanted or applied in vivo in an animal or human, provides controlled release of the BAS over the desired period of time. Alternatively, a blank formulation may be first prepared by the aforementioned methodology without incorporating the BAS in the formulation. An appropriate quantity of BAS is then added to this formulation to yield a BAS-loaded formulation which may control the release of the BAS for the desired length of time.