Granted Patent
Utility
US 4,419,184 · App. 06/284,815
Method for control of chemicals during gas treatment of suspensions
Inventor:
Ake Backlund
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Jul 20, 1981
Inventor
Ake Backlund
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.