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:
Apr. 02, 1985
Filed:
Jan. 27, 1984
Koichi Usui, Shibata, JP;
Masahide Ogawa, Shibata, JP;
Kunio Goto, Nakajo, JP;
Teiji Sato, Shibata, JP;
Masanori Tanaka, Shibata, JP;
Seikichi Takahashi, Nakajo, JP;
Kinichi Ono, Kurokawa, JP;
Seiji Kojima, Nakajo, JP;
Mizusawa Industrial Chemicals, Ltd., Osaka, JP;
Abstract
Disclosed is a filler for a heat-sensitive recording paper comprising finely divided amorphous silica having a BET specific surface area of 10 to 100 m.sup.2 /g and a bulk density of 0.14 to 0.30 g/cc, said finely divided amorphous silica having such a secondary particle size distribution that secondary particles having a size smaller than 4 microns, as measured by the centrifugal precipitation method, occupy at least 90% by weight of the total particles. This filler is excellent in the effects of preventing the background coloration, improving the lubricating property, preventing the adhesion of scum and improving the image density.