Granted Patent
Utility
US 5,801,276 · App. 08/910,442
Process for the preparation of hydroxypivalic acid
Inventors:
Karl H. Neumann, Winfried Joentgen, Dieter Heitkamp, Helmut Fiege
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: Aug 5, 1997
Inventors
Karl H. Neumann
Winfried Joentgen
Dieter Heitkamp
Helmut Fiege
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.