Granted Patent
Utility
US 4,313,012 · App. 06/105,054
Producing anthracene from creosote
Inventor:
David T. Burkitt
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Dec 19, 1979
Inventor
David T. Burkitt
Assignee (at issue)
ALLIED CONSULTING, 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.