Granted Patent
Utility
US 4,248,576 · App. 06/047,305
Apparatus for coating thermoplastic film
Inventors:
Aleck M. Birks, Michael I. Haluk, Edward M. Rothenberg
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Jun 11, 1979
Inventors
Aleck M. Birks
Michael I. Haluk
Edward M. Rothenberg
Assignee (at issue)
Canadian Industries Limited
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.