Granted Patent
Utility
US 6,617,419 · App. 10/009,889
Long-chain polyether polyols with a high proportion of primary oh groups
Inventors:
Jörg Hofmann, Pramod Gupta, Manfred Dietrich
Patented Case
View Patent ↗
Granted: Sep 9, 2003
Filed: Jan 28, 2002
Inventors
Jörg Hofmann
Pramod Gupta
Manfred Dietrich
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.