Granted Patent
Utility
US 6,027,755 · App. 08/837,559
Bleaching earth product and method for producing and using the same
Inventors:
John H. Henderson, Keith A. Delaney, Edward P. Molloy
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: Apr 21, 1997
Inventors
John H. Henderson
Keith A. Delaney
Edward P. Molloy
Assignee (at issue)
Engelhard 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.