Granted Patent
Utility
US 6,315,441 · App. 09/821,540
Mixing device with vanes having sloping edges and method of mixing viscous fluids
Inventor:
Ronnald B. King
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Mar 28, 2001
Inventor
Ronnald B. King
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.