Granted Patent
Utility
US 5,874,571 · App. 08/903,879
Process for the recovery of cephalexin
Inventors:
Wilhelmus H. J. Boesten, Eric C. Roos, Wilhelmus J. J. Van Den Tweel
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Jul 31, 1997
Inventors
Wilhelmus H. J. Boesten
Eric C. Roos
Wilhelmus J. J. Van Den Tweel
Assignee (at issue)
Chemferm V.O.F.
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.