Granted Patent
Utility
US 5,009,906 · App. 07/540,097
Method and composition for filtering beer, ale or malt liquor to reduce multivalent metal cations
Inventor:
Timothy R. Smith
Patented Case
View Patent ↗
Granted: Apr 23, 1991
Filed: Jun 19, 1990
Inventor
Timothy R. Smith
Assignee (at issue)
Manville Corporation
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.