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:
Jun. 27, 1989
Filed:
Mar. 21, 1988
Applicant:
Inventors:
Hakuai Inoue, Tokyo, JP;
Hiroshi Komiyama, Tokyo, JP;
Assignee:
Idemitsu Kosan Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01L / ;
U.S. Cl.
CPC ...
423211 ; 423 22 ; 423 44 ; 423 49 ; 423 59 ; 423 62 ; 423 76 ; 423 88 ; 423 96 ; 423 97 ; 423107 ; 423133 ; 423149 ; 423583 ; 423592 ; 423-604 ; 423608 ; 423609 ; 423610 ; 423611 ; 423612 ; 423618 ; 423623 ; 423624 ; 423625 ; 423641 ; 501108 ; 501102 ; 501123 ; 501126 ; 501134 ; 501152 ; 502-8 ; 502300 ; 502302 ; 502308 ; 502324 ; 502325 ; 502340 ; 502344 ; 502349 ; 502353 ;
Abstract
Ultra-fine spherical particles of a metal oxide having an average particle diameter of 40 nm or smaller can be prepared by a method in which a vaporizable metal compound is vaporized and decomposed under heating to give ultra-fine particles of a metal oxide followed by immediate cooling down to a temperature at which coalescence of the fine particles are prevented from coalescence. The fine particles have characteristics such as an excellent power of ultraviolet scattering.