![]() ![]() 239000010426 asphalt Substances 0.000 title claims description 54.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Phillips Petroleum Co filed Critical Phillips Petroleum Co Priority to US425457A priority Critical patent/US2882219A/en Application granted granted Critical Publication of US2882219A publication Critical patent/US2882219A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee Phillips Petroleum Co Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US425457A Inventor Paul H Johnson Current Assignee (The listed assignees may be inaccurate. Google Patents Recovery of cracking feed and asphaltÄownload PDF Info Publication number US2882219A US2882219A US425457A US42545754A US2882219A US 2882219 A US2882219 A US 2882219A US 425457 A US425457 A US 425457A US 42545754 A US42545754 A US 42545754A US 2882219 A US2882219 A US 2882219A Authority US United States Prior art keywords oil zone fraction asphalt extract Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US2882219A - Recovery of cracking feed and asphalt US2882219A - Recovery of cracking feed and asphalt
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