logo

For the Inventor, By the Inventor

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.:

US 5091189 B1

PDFFull Text
Date of Patent:
Feb. 25, 1992

Filed:

May. 17, 1991

Controlled release dosage forms having a defined water content

Applicant:
Inventors:

Joanne Heafield, Cambridge, GB;

Stewart I Leslie, Cambridge, GB;

Sandra T Malkowska, Cambridge, GB;

Philip J Neale, Cambridge, GB;

Assignee:

Euroceltique S.A., Luxembourg, LU;

Attorney:

Nixon & Vanderhye

Primary Examiner:

Thurman K Page

Assistant Examiner:

Leon R Horne

Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
424457 ; 424455 ; 424459 ; 424468 ;
Abstract

A controlled release, solid, oral dosage form containing a 3-alkylxanthine, preferably theophylline, at least one hydrophilic or hydrophobic polymer, at least one wax having a melting point between 25.degree. and 90.degree. C. and between 3% and 10% (by weight) water. Preferably the dosage form is a tablet and the water content is between 4% and 9% (by weight). The amount of water present in the dosage form determines the rate of release of the 3-alkylxanthine.

Find Patent Forward Citations

Heafield, Joanne. (1992). Controlled release dosage forms having a defined water content (U.S. Patent No. 5091189). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5091189

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…