Granted Patent
Utility
US 4,155,655 · App. 05/752,745
Apparatus for additive feeding
Inventors:
John J. Chiselko, William Hulbert
Patented Case
View Patent ↗
Granted: May 22, 1979
Filed: Dec 21, 1976
Inventors
John J. Chiselko
William Hulbert
Assignee (at issue)
Egan Machinery Company
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.