Granted Patent
Utility
US 5,320,899 · App. 08/134,498
Thermoplastic block copolymer films
Inventor:
Lie K. Djiauw
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Oct 12, 1993
Inventor
Lie K. Djiauw
Assignee (at issue)
SHELL OIL 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.