Granted Patent
Utility
US 5,336,621 · App. 07/211,940
Divalent hapten derivatives
Inventors:
Kathleen J. Primes, Gerald Sigler, Gerd Grenner, Wolfgang Kapmeyer
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Jun 27, 1988
Inventors
Kathleen J. Primes
Gerald Sigler
Gerd Grenner
Wolfgang Kapmeyer
Assignee (at issue)
Hoechst Celanese Corporation
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.