Granted Patent
Utility
US 6,077,339 · App. 08/954,603
Pigment preparations useful for ink-jet printing
Inventors:
Roger Nyssen, Dirk Pfutzenreuter, Rolf Richter, Fritz Puchner, Karin Hassenruck
Patented Case
View Patent ↗
Granted: Jun 20, 2000
Filed: Oct 20, 1997
Inventors
Roger Nyssen
Dirk Pfutzenreuter
Rolf Richter
Fritz Puchner
Karin Hassenruck
Assignees (at issue)
Bayer Aktiengesellschaft
Bayer Aktiengesellschaft
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.