Granted Patent
Utility
US 5,399,797 · App. 08/199,696
Manufacture of perchloroethylene by chlorinating hydrocarbons and partially chlorinated hydrocarbons in the presence of hydrogen
Inventors:
Jimmie T. Petrosky, Steven R. Hieger, Evert E. Gannaway, Charles R. Cupit
Patented Case
View Patent ↗
Granted: Mar 21, 1995
Filed: Feb 22, 1994
Inventors
Jimmie T. Petrosky
Steven R. Hieger
Evert E. Gannaway
Charles R. Cupit
Assignee (at issue)
Vulcan Materials Company
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.