Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
August 30, 2011
Patent Application Number
11867174
Date Filed
October 4, 2007
Patent Primary Examiner
Patent abstract
An ultra strong, hollow sintered, impervious, metallic shell for use in structural applications including proppants for hydraulic fracturing. The shell is made of a maraging steel, low alloy steel, or stainless steel with a crush strength of about 3,000 psi or greater and a density of about 0.6 g/cm3 to about 2.5 g/cm3.
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