Granted Patent
Utility
US 5,019,302 · App. 06/838,828
Method for granulation
Inventors:
Robert E. Sparks, Norbert S. Mason, Michael Center
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Mar 12, 1986
Inventors
Robert E. Sparks
Norbert S. Mason
Michael Center
Assignee (at issue)
Washington University Technology Associated, Inc.
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.