Method for covering a primary element for optical spectacles with primary members moulded from cork particles

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United States of America Patent

PATENT NO 11724473
APP PUB NO 20220317474A1
SERIAL NO

17624495

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Abstract

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A method for purifying powdered silicon carbide is in the form of a starting material to form a silicon carbide having a purity of at least 99.9%. This method has the following method steps: providing a starting material having a grain size of less than 100 μm and a silicon carbide content with at least 98% purity; and heating the starting material in a vacuum or oxygen-free atmosphere to a temperature above 1700° C. over a period of at least 8 minutes.

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Patent Owner(s)

Patent OwnerAddress
KILLINE OPTICAL LTDMACAO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jacquier, Hervé François Serge Lisbonne, PT 2 15
Lefebvre, Marc René André Louis Macao, MO 2 15

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