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:
Jan. 02, 2007
Filed:
May. 31, 2002
Applicant:
Elie S. Nuwayser, Woburn, MA (US);
Inventor:
Elie S. Nuwayser, Woburn, MA (US);
Assignee:
Biotek, Inc., Woburn, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K 9/16 (2006.01); A61K 9/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A multi-layered microcapsule containing one or more active ingredients and process for preparing the same is disclosed. The multi-layered microcapsule comprises an inner solid microparticle core, typically composed of a biodegradable polymer, and having one or more alternating layers of polymer, active ingredient or polymer/active ingredient mixtures to produce a multi-layered microcapsule wherein the polymer or active ingredient in each layer may be the same or different or have the same or different concentration of the polymer or active ingredient in other layers.