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US 4,650,592 AGranted
Self lubricating silicon nitride article
AssigneeGTE Products Corporation
InventorsRobert J. Dobbs, David E. Thomas, Dale E. Wittmer
Life of this patent
Estimating the term…
Abstract
An article is disclosed comprising particles of a silicon nitride based material and a lubricating material, the lubricating material occupying interconnected spaces within the article, the spaces being at least about 3% by volume of the article.
Claims3
An article comprising particles made of a silicon nitride based material and a lubricating material, and lubricating material occupying interconnected spaces within said article, said spaces being at least from about 3% to about 10.5% by volume of said article.
Dependencies are inferred from the claim text.