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:
Feb. 06, 1996
Filed:
Jun. 30, 1994
Applicant:
Inventor:
Amihay Freeman, Ben Shemen, IL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ; B01J / ; C12N / ;
U.S. Cl.
CPC ...
264-43 ; 264-41 ; 424455 ; 424461 ; 424493 ; 4284022 ; 435178 ; 514963 ; 514965 ;
Abstract
Encapsulation of active materials in chitosan beads of uniform size and improved mechanical and chemical stability. The active material is suspended in an acidic aqueous solution of a chitosan having a molecular weight of less than 250,000, the suspension is added dropwise to a crosslinking solution of diphosphate and glyoxal hydrate and the resulting beads are cured. It is possible to coat the active material with oil prior to suspension.