Patent · US Expired

Pigment in thin flakes and a method for manufacturing the same

US6432535B1 · kind B1 · utility

16Cited by

6References

16Claims

0Family size

Assignee

MERCK PATENT GESELLSCHAFT MIT BESHRANK TER HAFTUNG · DE

Inventors

Tamio Noguchi
Yukitaka Watanabe · Iwaki, JP

Key dates

Filing date	Jul 31, 2000
Grant date	Aug 13, 2002
Priority date	—
Expiry date	Nov 5, 2020

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2993
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A pigment in thin flakes where spherical silica particles having an average particle size of 20-400 nm are adhered on the surface of a flaky substrate having an average particle size of 0.5-10 &mgr;m and then the said spherical silica particle-adhered surface of the flaky substrate adhered with spherical silica is further coated with ultrafine particles of titanium dioxide.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.