Granted Patent
Utility
US 6,617,421 · App. 10/059,474
Method for producing substantially dry water-insoluble polymers for improved flocculation in the Bayer process
Inventors:
Everett C. Phillips, Ronald J. Allain
Patented Case
View Patent ↗
Granted: Sep 9, 2003
Filed: Jan 29, 2002
Inventors
Everett C. Phillips
Ronald J. Allain
Assignee (at issue)
Ondeo Nalco 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.