Granted Patent
Utility
US 5,447,870 · App. 08/145,289
Use of chromatographic supports having immobilized flocculating agent in separating microparticles
Inventor:
Hon-Peng P. Lau
Patented Case
View Patent ↗
Granted: Sep 5, 1995
Filed: Oct 29, 1993
Inventor
Hon-Peng P. Lau
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND 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.