Granted Patent
Utility
US 6,479,624 · App. 09/813,452
Polymer solution preheater and method for preheating such solutions
Inventors:
Angelia M. Wepener, Felix Streiff
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Mar 21, 2001
Inventors
Angelia M. Wepener
Felix Streiff
Assignee (at issue)
Koch-Glitsch, LP
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.