Process for producing hollow, bilayered silicate microspheres

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United States of America Patent

PATENT NO 4549892
SERIAL NO

06506649

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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This invention relates to a process for producing a hollow microsphere wherein the inner portion of the shell of which comprises the reaction product of a silicate and a first insolubilizing agent, the outer portion of the shell of which comprises the reaction product of a silicate and a second insolubilizing agent and wherein the equivalent ratio of silicate to, respectively, the first and second insolubilizing agent is less in respect of said inner portion than said outer portion.

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Patent Owner(s)

Patent OwnerAddress
PQ CORPORATION EXECUTIVE MALL A CORP OF PAP O BOX 840 VALLEY FORGE PA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Baker, Alfred G 41 Myrtle St., Glen Waverley, Victoria 3150, AU 2 91
Baker, Andrew J 41 Myrtle St., Glen Waverley, Victoria 3150, AU 5 101

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