Patent · US Active

Particles with improved colour shielding

US11596582B2 · kind B2 · utility

0Cited by

8References

14Claims

0Family size

Assignee

Ivoclar Vivadent AG · LI

Inventors

Kai Rist · Feldkirch, AT
Annette Schmidt · Cologne, DE
Ahmad Shaaban · Cologne, DE

Key dates

Filing date	Aug 16, 2019
Grant date	Mar 7, 2023
Priority date	—
Expiry date	Aug 11, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09C2210/00
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The present invention relates to particles comprising a core, in particular a magnetic core, and a first coating of a first shell material, wherein a second coating of a second shell material is applied to the surface of the first coating facing away from the core, the second shell material is different from the first shell material and has a higher refractive index than the first shell material.

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