Granted Patent
Utility
US 6,406,631 · App. 09/702,046
Two stage diafiltration method and apparatus
Inventors:
Gregory R. Collins, Edward Spence, James Summerton
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Oct 30, 2000
Inventors
Gregory R. Collins
Edward Spence
James Summerton
Assignee (at issue)
Nephros Inc.
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.