Granted Patent
Utility
US 4,215,035 · App. 06/028,958
Thermally stable sulfur dioxide-ethylene-vinyl ester terpolymers and process for preparing same
Inventors:
Leroy J. Memering, Lorrin W. Pyle
Patented Case
View Patent ↗
Granted: Jul 29, 1980
Filed: Apr 11, 1979
Inventors
Leroy J. Memering
Lorrin W. Pyle
Assignee (at issue)
National Distillers and Chemical 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.