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:
Sep. 09, 1997
Filed:
Oct. 25, 1995
Younsik Cha, Salt Lake City, UT (US);
Young Kweon Choi, Salt Lake City, UT (US);
Chaul Min Pai, Taejon, KR;
Macromed, Inc., Salt Lake City, UT (US);
Abstract
Peptide/protein biodegradable drug delivery devices are prepared as microspheres without the use of solvents by a polymer melt process. A melt of thermostable polypeptides and an appropriate low melting block copolymer mixture is prepared and dispersed in an appropriate fluid medium such as air, water or an immiscible organic fluid without using any organic solvent to form microdroplets. The fluid medium is cooled to solidify the microdroplets into microspheres and then collected and purified or further processed as drug delivery devices. These biodegradable microspheres are suitable as implantable or injectable pharmaceutical formulations. Following administration as solid microspheres into the body of a warm blooded animal, the formulations absorb water from the body to form a hydrogel from which the polypeptide is released continuously over an extended period of time.