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:
Jul. 29, 1997
Filed:
Jul. 28, 1994
Akira Kaijou, Sodegaura, JP;
Idemitsu Kosan Company Limited, Tokyo, JP;
Abstract
A water repellent silica sol comprises colloidal silica particles of a size of 100 nm or less whose surfaces have been made water-repellent by an organic group-substituted silane. The water repellent silica sol is produced by a process which comprises reacting a silica colloid dispersed in a non-polar organic solvent with an organic group-substituted silane so that the surfaces of the colloidal silica particles are made water-repellent by the organic group-substituted silane. Alternatively, the water repellent silicate sol is prepared by a process which comprises adding a non-polar organic solvent, a cationic surface active agent and an organic group-substituted silane to a water-dispersed silica colloid, forming an emulsion therefrom, removing water from the emulsion by azeotropic dehydration and refluxing the emulsion under heating.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile