Cerium based glass polishing compositions

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United States of America Patent

PATENT NO 4601755
SERIAL NO

06635828

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Abstract

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Cerium based glass polishing compositions, well adapted for the polishing, e.g., of optical glass, are comprised of (i) at least one crystalline phase of CeO.sub.2 type, and (ii) a crystalline phase which comprises a rare earth pyrosilicate having the formula Ln.sub.2-x Ce.sub.x Si.sub.2 O.sub.7, wherein Ln is at least one lanthanide or yttrium and x is a number ranging from zero to less than 2.

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Patent Owner(s)

Patent OwnerAddress
RHONE-POULENC SPECIALITES CHIMIQUES "LES MIROIRS"18 AVENUE D'ALSACE 92400 - COURBEVOIE

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Melard, Pierre Lagord, FR 3 104
Peltier, Marcel La Rochelle, FR 4 266
Tastu, Francis Nieul/sur/Mer, FR 4 125

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