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. 04, 1992
Filed:
Jan. 02, 1991
Applicant:
Inventors:
Shiro Minayoshi, Akashi, JP;
Naofumi Saitoh, Akashi, JP;
Toshio Higashi, Akashi, JP;
Noritsugu Ebisuya, Akashi, JP;
Assignee:
Maruo Calcium Company, Limited, Akashi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
252309 ; 524425 ;
Abstract
The present invention provides a glycol dispersion comprising calcium carbonate and glycol prepared by wet-grinding under the specified conditions a glycol slurry composed of glycol and calcium carbonate satisfying the specified dispersibility and particle size. The glycol dispersion of the present invention is good in dispersion stability in glycol and is capable of improving running property of audio tapes, video tapes, etc., thus contributing to improvement in properties such as sound and image.