Granted Patent
Utility
US 4,944,167 · App. 07/433,794
Backflushing pressure diffuser screens
Inventors:
Finn Jacobsen, Ole J. Richter
Patented Case
View Patent ↗
Granted: Jul 31, 1990
Filed: Nov 9, 1989
Inventors
Finn Jacobsen
Ole J. Richter
Assignee (at issue)
Kamyr AB
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.