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. 15, 2003
Filed:
Oct. 03, 2001
Kirk Dee Fowers, Layton, UT (US);
Gaylen M. Zentner, Salt Lake City, UT (US);
Chung Shih, Sandy, UT (US);
Ai-Zhi Piao, Salt Lake City, UT (US);
Macromed Incorporated, Sandy, UT (US);
Abstract
Polymeric compositions having improved capability of solubilizing a drug in a hydrophilic environment to form a solution, comprising: a biodegradable polyester oligomer; and biodegradable AB-type, ABA-type, or BAB-type block copolymers are disclosed. The copolymers are comprised of about 50.1 to 65% by weight of a biodegradable, hydrophobic A polymer block comprising a biodegradable polyester, and about 35 to 49.9% by weight of a hydrophilic B polymer block comprising a polyethylene glycol (PEG), and wherein the block copolymer has a weight averaged molecular weight of between 2400 to 4999. The biodegradable polyester oligomer of said composition is within a range of 0.01% to 30% by weight of the total polymer mixture, and the content of the biodegradable AB-type, ABA-type, or BAB-type block copolymer is within a range of 70% to 99.99% by weight of the total polymer mixture.