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:
Jun. 05, 1984
Filed:
Dec. 03, 1982
Applicant:
Inventor:
John S Kent, Palo Alto, CA (US);
Assignee:
Syntex (U.S.A.) Inc., Palo Alto, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ; A61K / ; A61K / ;
U.S. Cl.
CPC ...
424 19 ; 424 22 ; 424 28 ; 424 14 ; 424177 ; 424178 ; 424179 ; 424 95 ;
Abstract
Delivery systems for releasing macromolecular active agents to a body site at a controlled rate for a prolonged period of time, comprising a cholesteric matrix permeable to passage of the macromolecular active agent by diffusion, are disclosed. The cholesteric matrix comprises cholesterol powder and cholesterol prills optionally in combination with a binding agent and a lubricating agent. The macromolecular active agent is dispersed throughout the matrix; macromolecules suitable for release from this delivery system have molecular weights of about 1300 to about 75,000 and are at least very slightly soluble in water.
Published as: