Granted Patent
Utility
US 5,747,484 · App. 08/551,480
Crystalline cepham acid addition salts and processes for their preparation
Inventors:
Rudolf Lattrell, Walter Durckheimer, Peter Schmid
Patented Case
View Patent ↗
Granted: May 5, 1998
Filed: Nov 1, 1995
Inventors
Rudolf Lattrell
Walter Durckheimer
Peter Schmid
Assignee (at issue)
Hoechst GmbH
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.