Granted Patent
Utility
US 4,798,868 · App. 07/082,260
Ternary blends of polyvinyl chloride
Inventors:
Frank E. Lordi, Peter J. Vanderpool
Patented Case
View Patent ↗
Granted: Jan 17, 1989
Filed: Aug 6, 1987
Inventors
Frank E. Lordi
Peter J. Vanderpool
Assignee (at issue)
Arco Chemical 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.