Granted Patent
Utility
US 6,462,200 · App. 09/948,826
Diphosphines
Inventors:
Birgit Driessen-Holscher, Joachim Kralik, Inga Ritzkopf, Christian Steffens, Guido Giffels, Claus Dreisbach, Thomas Prinz, Walter Lange
Patented Case
View Patent ↗
Granted: Oct 8, 2002
Filed: Sep 7, 2001
Inventors
Birgit Driessen-Holscher
Joachim Kralik
Inga Ritzkopf
Christian Steffens
Guido Giffels
Claus Dreisbach
Thomas Prinz
Walter Lange
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.