Granted Patent
Utility
US 5,759,472 · App. 08/684,437
Liquid color system for use in rotational molding and method of using the same
Inventors:
Paul J. DeFranco, Robert J. Opalko
Patented Case
View Patent ↗
Granted: Jun 2, 1998
Filed: Jul 17, 1996
Inventors
Paul J. DeFranco
Robert J. Opalko
Assignee (at issue)
Ferro 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.