Granted Patent
Utility
US 4,565,742 · App. 06/543,759
Process for forming a sealant WEB-PVDC-base film laminate
Inventor:
Theodore J. Lang
Patented Case
View Patent ↗
Granted: Jan 21, 1986
Filed: Oct 20, 1983
Inventor
Theodore J. Lang
Assignee (at issue)
DuPont Canada Inc.
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.