Granted Patent
Utility
US 5,203,504 · App. 07/801,594
Preparing mixed liquids
Inventors:
Andrew Frost, John A. Marchant
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Dec 5, 1991
Inventors
Andrew Frost
John A. Marchant
Assignee (at issue)
British Technology Group Limited
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.