Granted Patent
Utility
US 6,638,342 · App. 09/996,201
Process and facility for removing metal contaminants from fertilizer streams
Inventors:
Raymond Raulfs Gansley, Michael T. Hammer, Michael L. Mengel
Patented Case
View Patent ↗
Granted: Oct 28, 2003
Filed: Nov 28, 2001
Inventors
Raymond Raulfs Gansley
Michael T. Hammer
Michael L. Mengel
Assignee (at issue)
Marsulex Environmental Technologies 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.