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. 28, 1987
Filed:
Jul. 03, 1985
Applicant:
Inventor:
Wen-Ghih Tsang, Lexington, MA (US);
Assignee:
Damon Biotech, Inc., Needham Heights, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ; A61K / ; B01J / ;
U.S. Cl.
CPC ...
264-43 ; 210650 ; 424455 ; 424491 ; 424493 ; 4284022 ; 514962 ; 604891 ;
Abstract
Disclosed is a method for loading capsules having a semipermeable membrane with a chemically active substance to be released over time. The method first involves gradually deflating and dehydrating the capsules and subsequently soaking the deflated capsules in a solution containing the substance to be encapsulated. After loading, the permeability of the capsule may be adjusted to accommodate the requirements of the end use. The loaded capsules of this invention may be used in a variety of applications, including use as a bioimplantable drug or biochemical delivery system.