Granted Patent
Utility
US 4,826,089 · App. 06/777,963
Treating asphaltene bearing fuels
Inventor:
Emmanuel Psaltopoulos
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Sep 19, 1985
Inventor
Emmanuel Psaltopoulos
Assignee (at issue)
Columbia Chase Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.