Granted Patent
Utility
US 4,243,514 · App. 06/038,928
Preparation of FCC charge from residual fractions
Inventor:
David B. Bartholic
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: May 14, 1979
Inventor
David B. Bartholic
Assignee (at issue)
Engelhard Minerals & Chemicals 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.