Granted Patent
Utility
US 5,008,352 · App. 07/307,563
Substituted aromatic polymers
Inventor:
Brian N. Hendy
Patented Case
View Patent ↗
Granted: Apr 16, 1991
Filed: Feb 8, 1989
Inventor
Brian N. Hendy
Assignee (at issue)
IMPERIAL CHEMICAL 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.