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:
Aug. 14, 1990
Filed:
Jun. 20, 1989
Chuichi Hirayama, Shimonabe-machi, Kumamoto-shi, Kumamoto-ken, JP;
Yoshiaki Motozato, Hotakubohonmachi, Kumamoto-shi, Kumamoto-ken, JP;
Hirotaka Ihara, Shimizu-machi, Takahira, Kumamoto-shi, Kumamoto-ken, JP;
Other;
Juridical Foundation the Chemo-Sero-Therapeutic Research Institute, all of, JP;
Mitsui Toatus Chemical, Inc., all of, JP;
Abstract
The present invention provides novel spherical grains of polyamino acid wh can be used as a filler in chromatography, cosmetic powder and the like. The spherical grains can be produced by a method which comprises the steps of preparing a solution of hydrophobic polyamino acid such as poly n-leucine dissolved in an organic solvent; adding the solution to an aqueous medium and agitating said medium so as to obtain a dispersion of the spherical grains of the polyamino acid dispersed in the aqueous medium while evaporating the organic solvent; and taking out the spherical grains of polyamino acid from the dispersion.