Granted Patent
Utility
US 4,775,459 · App. 06/931,280
Method for controlling fouling deposit formation in petroleum hydrocarbons or petrochemicals
Inventor:
David R. Forester
Patented Case
View Patent ↗
Granted: Oct 4, 1988
Filed: Nov 14, 1986
Inventor
David R. Forester
Assignee (at issue)
Betz Laboratories, Inc.
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.