Granted Patent
Utility
US 6,833,433 · App. 10/297,542
Method for producing aliphatic oligocarbonate diols
Inventors:
Andreas Schlemenat, Jörg Tillack, Jörg Laue, Herbert Witossek
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Dec 4, 2002
Inventors
Andreas Schlemenat
Jörg Tillack
Jörg Laue
Herbert Witossek
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.