Granted Patent
Utility
US 5,034,469 · App. 07/539,548
Hydrogenation of unsaturated polymers containing nitrile groups
Inventors:
Hartmuth Buding, Joachim Thormer, Wilfried Nolte, Johann Hohn, Paul Fiedler, Thomas Himmler
Patented Case
View Patent ↗
Granted: Jul 23, 1991
Filed: Jun 18, 1990
Inventors
Hartmuth Buding
Joachim Thormer
Wilfried Nolte
Johann Hohn
Paul Fiedler
Thomas Himmler
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.