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. 29, 1998
Filed:
Feb. 20, 1997
Sambasiva Rao Ghanta, Centerville, OH (US);
Robert Edmon Guisinger, Dayton, OH (US);
Eurand America, Inc., Vandalia, OH (US);
Abstract
This disclosure is directed to preparation of individual taste-masked, high bioavailability, high payload, microcapsules by microencapsulation of water-insoluble NSAID drug materials in the substantial absence of microcapsule agglomerates. These taste-masked microcapsules contain a high payload, e.g., about 83+ wt. % of said NSAID drug material having high bioavailability and can then be formulated into chewable tablets and liquid aqueous suspensions for medicinal use. Both cellulose acetate phthalate and gelatin are the microencapsulating polymer wall material. Control of pH, controlled addition of a Hofmeister (lyotropic) salt, microencapsulation of the water-insoluble NSAID medicament with a liquid phase of both cellulose acetate phthalate and gelatin microencapsulating material and the subsequent insolubilization of said liquid encapsulating material after it is wrapped around the medicament core with dilute acid are important process parameters to achieving the proper individual microcapsules to obtain highly bioavailability taste-masked, water-insoluble NSAID drug materials, esp., naproxen and ibuprofen, by microencapsulation alone.