Granted Patent
Utility
US 4,797,235 · App. 07/039,551
Process for enhanced orientation of polymeric films
Inventors:
Steven B. Garland, Thomas C. Warren
Patented Case
View Patent ↗
Granted: Jan 10, 1989
Filed: Apr 16, 1987
Inventors
Steven B. Garland
Thomas C. Warren
Assignee (at issue)
W. R. Grace & Co.
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.