Granted Patent
Utility
US 6,794,543 · App. 10/276,210
Method for producing arylpoly(oxalkyl)-benzyldimethyl-ammonium derivatives
Inventors:
Klaus Raab, Gerhard Crass, Rudolf Aigner
Patented Case
View Patent ↗
Granted: Sep 21, 2004
Filed: Nov 14, 2002
Inventors
Klaus Raab
Gerhard Crass
Rudolf Aigner
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.