Granted Patent
Utility
US 4,319,894 · App. 05/951,689
Process and process apparatus for separating gaseous phosphorus trichloride from a gas stream
Inventors:
Alan L. Kempner, Robert H. Kaplan
Patented Case
View Patent ↗
Granted: Mar 16, 1982
Filed: Oct 16, 1978
Inventors
Alan L. Kempner
Robert H. Kaplan
Assignee (at issue)
Stauffer Chemical 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.