Granted Patent
Utility
US 5,887,973 · App. 08/849,113
Device for mixing particulate material and liquid
Inventors:
Stefan Ahman, Nils Bringfors, Lars-Erik Johansson
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Aug 8, 1997
Inventors
Stefan Ahman
Nils Bringfors
Lars-Erik Johansson
Assignee (at issue)
ABB Flakt 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.