Granted Patent
Utility
US 4,115,299 · App. 05/663,865
Frothing method and an apparatus for carrying out the method
Inventor:
Dietrich Muhle
Patented Case
View Patent ↗
Granted: Sep 19, 1978
Filed: Mar 4, 1976
Inventor
Dietrich Muhle
Assignee (at issue)
The Upjohn Co.
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.