Granted Patent
Utility
US 5,840,902 · App. 08/752,885
Process for the preparation of beta-hydroxyalkypicolinium salts
Inventors:
Karlheinrich Meisel, Klaus Walz, Gerd-Friedrich Renner, Hans Schulze, Carsten Gerdes, Karl-Rudolf Gassen, Reiner Ditzer, Lothar Klein
Patented Case
View Patent ↗
Granted: Nov 24, 1998
Filed: Nov 20, 1996
Inventors
Karlheinrich Meisel
Klaus Walz
Gerd-Friedrich Renner
Hans Schulze
Carsten Gerdes
Karl-Rudolf Gassen
Reiner Ditzer
Lothar Klein
Assignee (at issue)
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.