Granted Patent
Utility
US 6,683,144 · App. 10/177,704
Water-soluble or water-swellable crosslinked copolymers
Inventors:
Matthias Loffler, Roman Morschhäuser
Patented Case
View Patent ↗
Granted: Jan 27, 2004
Filed: Jun 21, 2002
Inventors
Matthias Loffler
Roman Morschhäuser
Assignee (at issue)
Clariant 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.