Granted Patent
Utility
US 5,110,991 · App. 07/677,934
Heterogeneous catalyst for alkoxylation of alcohols
Inventors:
Donald H. Champion, George P. Speranza
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Apr 1, 1991
Inventors
Donald H. Champion
George P. Speranza
Assignee (at issue)
Texaco Chemical Inc.
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.