Granted Patent
Utility
US 5,019,137 · App. 07/508,497
Method for cleaning gases containing condensable components
Inventor:
Seppo Ruottu
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Apr 12, 1990
Inventor
Seppo Ruottu
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.