Granted Patent
Utility
US 4,895,958 · App. 07/292,709
3-aminophenyl-3-(phenylsulfonyl)-1,1-bis(aminophenyl/indol-3-yl) propenes
Inventors:
William M. Hung, James E. Kassner
Patented Case
View Patent ↗
Granted: Jan 23, 1990
Filed: Jan 3, 1989
Inventors
William M. Hung
James E. Kassner
Assignee (at issue)
Hilton Davis Co.
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.