Granted Patent
Utility
US 5,149,447 · App. 07/704,754
Creosote filtration system with a shell and tube type filtration device
Inventors:
Mansour Mashayekhi, Roger L. Haley, Joe E. Payne, C. Conrad Kempton
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: May 23, 1991
Inventors
Mansour Mashayekhi
Roger L. Haley
Joe E. Payne
C. Conrad Kempton
Assignee (at issue)
AlliedSignal, 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.