Granted Patent
Utility
US 6,648,147 · App. 09/674,527
Phase-separation member
Inventors:
Richard Lydon, Fredrick Doran
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Feb 20, 2001
Inventors
Richard Lydon
Fredrick Doran
Assignee (at issue)
MADISON FILTER 981 LIMITED
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.