U.S. federal trademark · Serial No. 78492903 · Reg. No. 690907
Oil refinery systems composed of distillation towers, distillation columns, crude oil fractionators, crude oil flash drums, solvent de-asphalting units and de-asphalting oil crackers used for upgrading heavy oil, bitumen, tars, shale oil or refinery residues to lighter, lower viscosity product
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