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, 1997
Filed:
Oct. 04, 1995
Applicant:
Inventor:
Elie S Nuwayser, Wellesley, MA (US);
Assignee:
Biotek, Inc., Woburn, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ; A01N / ;
U.S. Cl.
CPC ...
424489 ; 424490 ; 424426 ; 424421 ; 424602 ; 424696 ; 428402 ; 42840224 ; 428403 ; 264-5 ; 264-7 ; 514952 ; 71 6413 ; 71DI / ;
Abstract
A novel method of producing biodegradable microparticles is disclosed. Inorganic calcium salts are mixed with water to form a slurry. The slurry is then added to an oil bath which is then mixed to form an emulsion. The mixing continues for a period of time sufficient to form hardened microparticles. The hardened microparticles are then retrieved and characterized. Biologically active agents may be added to the slurry prior to emulsification, or they may be added to the hardened microparticles after production. The microparticles may be injected into a human being whereby they act as controlled release drug delivery vehicles.