Granted Patent
Utility
US 4,879,358 · App. 07/250,884
Process for fluorinating linear alternating polyketone polymers and articles produced therefrom
Inventor:
John R. Kastelic
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Sep 29, 1988
Inventor
John R. Kastelic
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.