Granted Patent
Utility
US 5,538,621 · App. 08/282,103
Solvated mesophase pitches
Inventors:
Walter M. Kalback, H. Ernest Romine, Xavier Bourrat
Patented Case
View Patent ↗
Granted: Jul 23, 1996
Filed: Jul 28, 1994
Inventors
Walter M. Kalback
H. Ernest Romine
Xavier Bourrat
Assignee (at issue)
Conoco 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.