Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
December 28, 2010
Patent Application Number
12002648
Date Filed
December 18, 2007
Patent Citations Received
Patent Primary Examiner
Patent abstract
A process of producing a roofing shingle coating asphalt from an asphalt feedstock includes the following steps. Wax and blowing catalyst are added to the asphalt feedstock. Then the asphalt feedstock is blown to produce the coating asphalt. The coating asphalt has a softening point within a range of from about 190° F. (88° C.) to about 235° F. (113° C.) and has a penetration of at least about 15 dmm at 77° F. (25° C.).
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