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:
Jan. 23, 1996
Filed:
Jul. 08, 1994
Applicant:
Inventors:
Kanemasa Takado, Takaoka, JP;
Tatsuo Murakami, Kamiichi, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K / ; C01B / ;
U.S. Cl.
CPC ...
424602 ; 423265 ; 423308 ; 423309 ;
Abstract
The object of the present invention is to prepare a calcium hydrogen phosphate that has excellent binding properties, a large oil adsorption capacity and a specific surface area, and is therefore suitable as an excipient. A scale-like calcium hydrogen phosphate is prepared by reacting phosphoric acid with an alkaline calcium compound such as quick lime, in the presence of a multivalent organic acid with coordinating ability, such as citric acid, to obtain a columnar calcium hydrogen phosphate, and then hydrothermally treating the obtained columnar calcium hydrogen phosphate at a temperature of 60.degree. C. or higher.