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:
Oct. 04, 1994
Filed:
Jan. 17, 1992
Applicant:
Inventor:
Steven Robertson, Strathclyde, GB;
Assignee:
British Technology Group Ltd., London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
424436 ; 424486 ;
Abstract
Controlled release compositions comprising a water swellable carrier and an active material having crenellated surface exhibit improved release properties. Suppositories and pessaries of generally cylindrical shape having four or five crenellations spaced equally around the perimeter and extending substantially along the length of the cylinder are preferred. Suppositories comprising four or five rounded crenellations which release morphine sulphate are especially useful.