Patent · US Expired

Cerium/rare earth polishing compositions

US4786325A · kind A · utility

42Cited by

3References

86Claims

0Family size

Assignee

Rhone-Poulenc Specialities Chimiques · FR

Inventors

Pierre Melard · Lagord, FR
Francis Tastu · La Rochelle, FR

Key dates

Filing date	Jul 21, 1986
Grant date	Nov 22, 1988
Priority date	—
Expiry date	Jul 21, 2006

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K3/1454
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Glass polishing compositions, advantageously recycled into glassmaking formulations, are comprised of suspension of particulate ceric oxide and at least one colorless oxide of a lanthanide or yttrium rare earth, preferably an oxide of lanthanum, samarium, europium, gadolinium, dysprosium, thulium, ytterbium, lutecium, yttrium, or mixtures thereof.

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