Granted Patent
Utility
US 6,576,255 · App. 09/889,565
Injection molding method for (meth)acrylate copolymers having tertiary ammonium groups
Inventors:
Hans-Ulrich Petereit, Thomas Beckert, Manfred Assmus, Werner Hoess, Wolfgang Fuchs, Hartmut Schikowsky
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Jul 30, 2001
Inventors
Hans-Ulrich Petereit
Thomas Beckert
Manfred Assmus
Werner Hoess
Wolfgang Fuchs
Hartmut Schikowsky
Assignee (at issue)
ROEHM GMBH & CO. KG
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.