Granted Patent
Utility
US 5,642,939 · App. 08/639,313
Liquid mixing, conveying and circulating system for pulverulent material
Inventor:
Mathis P. Comardo
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Apr 24, 1996
Inventor
Mathis P. Comardo
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.