Granted Patent
Utility
US 6,482,993 · App. 09/673,583
Method for producing long chain polyether polyols without reprocessing
Inventors:
Jörg Hofmann, Pramod Gupta
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Oct 18, 2000
Inventors
Jörg Hofmann
Pramod Gupta
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.