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:
Jun. 24, 2003
Filed:
Sep. 13, 2000
Pedro Bittmann, Zürich, CH;
Brent Atkinson, Lakewood, CO (US);
James J. Benedict, Golden, CO (US);
John Ranieri, Austin, TX (US);
Marsha L. Whitney, Austin, TX (US);
Donald Chickering, Framingham, MA (US);
Sulzer Innotec AG, Winterthur, CH;
Abstract
The composition as described serves for in vivo cartilage repair. It basically consists of a naturally derived osteoinductive and/or chondroinductive mixture of factors (e.g. derived from bone) or of a synthetic mimic of such a mixture combined with a nanosphere delivery system. A preferred mixture of factors is the combination of factors isolated from bone, known as BP and described by Poser and Benedict (WO 95/13767). The nanosphere delivery system consists of nanospheres defined as polymer particles of less than 1000 nm in diameter (whereby the majority of particles preferably ranges between 200-400 nm) in which nanospheres the combination of factors is encapsulated. The nanospheres are loaded with the mixture of factors in a weight ratio of 0.001 to 17% (w/w), preferably of 1 to 4% (w/w) and have a release profile with an initial burst of 10 to 20% of the total load over the first 24 hours and a long time release of at least 0.1 per day during at least seven following days. The nanospheres are composed of e.g. ((D,L)-lactic acid/glycolic acid)-copolymer (PLGA). The loaded nanospheres are e.g. made by phase inversion. The composition is advantageously utilized as a device comprising any biodegradable matrix in which the nanospheres loaded with the factor combination is contained.