Granted Patent
Utility
US 4,639,490 · App. 06/822,705
Process for preparing novel copolymer
Inventors:
William F. Masler, III, Zahid Amjad
Patented Case
View Patent ↗
Granted: Jan 27, 1987
Filed: Jan 27, 1986
Inventors
William F. Masler, III
Zahid Amjad
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.