Granted Patent
Utility
US 4,871,780 · App. 07/200,496
Porous copolymer resins
Inventor:
Zaev Sharaby
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: May 31, 1988
Inventor
Zaev Sharaby
Assignee (at issue)
B. F. Goodrich 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.