Granted Patent
Utility
US 5,763,690 · App. 08/691,760
Manufacture of trimethylolpropane
Inventors:
Jeffrey S. Salek, Joseph Pugach, Carole L. Elias, Leonard A. Cullo
Patented Case
View Patent ↗
Granted: Jun 9, 1998
Filed: Aug 2, 1996
Inventors
Jeffrey S. Salek
Joseph Pugach
Carole L. Elias
Leonard A. Cullo
Assignee (at issue)
Aristech Chemical Company
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.