Granted Patent
Utility
US 4,388,446 · App. 06/301,936
Polyethylene terephthalate blends
Inventors:
Edwin D. Hornbaker, Jesse D. Jones
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Sep 14, 1981
Inventors
Edwin D. Hornbaker
Jesse D. Jones
Assignee (at issue)
Ethyl 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.