Granted Patent
Utility
US 4,261,944 · App. 05/964,002
Method for the manufacture of biaxially stretched polyolefin film
Inventors:
Walter Hufnagel, Volker Graap, deceased, Friedrich F. von und zu Aufsess, Rotger Armsen
Patented Case
View Patent ↗
Granted: Apr 14, 1981
Filed: Nov 27, 1978
Inventors
Walter Hufnagel
Volker Graap, deceased
Friedrich F. von und zu Aufsess
Rotger Armsen
Assignee (at issue)
Lever Brothers Company
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.