Granted Patent
Utility
US 5,505,906 · App. 07/708,207
Cleaning of high temperature high pressure (HTHP) gases
Inventors:
Folke Engstrom, Juhani Isaksson
Patented Case
View Patent ↗
Granted: Apr 9, 1996
Filed: May 31, 1991
Inventors
Folke Engstrom
Juhani Isaksson
Assignee (at issue)
A. Ahlstrom Corporation
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.