Granted Patent
Utility
US 4,447,387 · App. 06/430,370
Process for manufacture of tubular film
Inventors:
Theodore R. Blakeslee, III, Randall Wu
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Sep 30, 1982
Inventors
Theodore R. Blakeslee, III
Randall Wu
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.