Granted Patent
Utility
US 4,643,753 · App. 06/763,293
Method for making spherical particles
Inventor:
Rudolf Braun
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Aug 7, 1985
Inventor
Rudolf Braun
Assignee (at issue)
Potters Industries, LLC
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.