Granted Patent
Utility
US 4,877,424 · App. 07/160,669
Method and apparatus for separating solids from a solids-gas mixture
Inventors:
Markku Perkola, Ilkka Seppa
Patented Case
View Patent ↗
Granted: Oct 31, 1989
Filed: Feb 26, 1988
Inventors
Markku Perkola
Ilkka Seppa
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.