Granted Patent
Utility
US 4,649,207 · App. 06/862,742
Derivatives of diphenylhexafluoropropane
Inventors:
Kreisler Lau, William J. Kelleghan
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: May 13, 1986
Inventors
Kreisler Lau
William J. Kelleghan
Assignee (at issue)
Hughes Aircraft 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.