Granted Patent
Utility
US 4,617,294 · App. 06/725,444
Animal feed supplement
Inventors:
Thomas G. Krivak, Stanley A. Heimburger, James T. Dew
Patented Case
View Patent ↗
Granted: Oct 14, 1986
Filed: Apr 22, 1985
Inventors
Thomas G. Krivak
Stanley A. Heimburger
James T. Dew
Assignee (at issue)
PPG Industries, 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.