Granted Patent
Utility
US 5,164,516 · App. 07/654,993
Purification of cyclic ketene acetals
Inventors:
Saubhagya C. Mathur, Jeffrey J. Vanderbilt
Patented Case
View Patent ↗
Granted: Nov 17, 1992
Filed: Feb 14, 1991
Inventors
Saubhagya C. Mathur
Jeffrey J. Vanderbilt
Assignee (at issue)
EASTMAN KODAK 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.