US Patent 7857904 Process of producing roofing shingle coating asphalt
Patent 7857904 was granted and assigned to Owens Corning on December, 2010 by the United States Patent and Trademark Office.
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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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US Patent 07857904 Process of producing roofing shingle coating asphalt US Patent 7857904 Process of producing roofing shingle coating asphalt
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Patent Number
0785790400
Patent Number
785790400
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Is a
Current Assignee
Patent Jurisdiction
Patent Number
078579040
Date of Patent
December 28, 2010
0Patent Application Number
120026480
Date Filed
December 18, 2007
0Official Website
Patent Primary Examiner
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
078579040
Date of Patent
December 28, 2010
0Patent Application Number
120026480
Date Filed
December 18, 2007
0Official Website
Patent Primary Examiner
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US Patent 07857904 Process of producing roofing shingle coating asphalt
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07857904
Date of patent
December 28, 2010
Patent application number
12002648
Date Filed
December 18, 2007
Patent primary examiner
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