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. 23, 1993
Filed:
Sep. 15, 1986
Yoshimitsu Iida, Saitama, JP;
Shuji Sumida, Tokyo, JP;
Chugai Seiyaku Kabushiki Kaisha, Tokyo, JP;
Abstract
A slow-release pharmaceutical agent which comprises fumaric acid and/or DL-tryptophan in addition to one or more pharmaceutically active substances, and a process for preparation of the same are disclosed. Among many organic acids and amino acids, fumaric acid and DL-tryptophan are remarkably useful for extending the duration of release of a pharmacologically active substance when fumaric acid, DL-tryptophan or both is used for formulation of a pharmaceutical agent. The pharmaceutical agent may be in any solid form of formulations such as powder, granule, tablet, troche, capsule, suppository, etc., and may be used with practically all types of drugs.