Granted Patent
Utility
US 4,461,734 · App. 06/417,579
Process for plasticization and pumping of low bulk density plastics
Inventors:
David N. Jones, Urho S. Haapala, Leonard S. Scarola
Patented Case
View Patent ↗
Granted: Jul 24, 1984
Filed: Sep 13, 1982
Inventors
David N. Jones
Urho S. Haapala
Leonard S. Scarola
Assignee (at issue)
Union Carbide 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.