Granted Patent
Utility
US 5,675,021 · App. 08/417,597
Method to produce and purify cyclic esters
Inventors:
Timothy J. Eggeman, Herman P. Benecke
Patented Case
View Patent ↗
Granted: Oct 7, 1997
Filed: Apr 5, 1995
Inventors
Timothy J. Eggeman
Herman P. Benecke
Assignee (at issue)
Chronopol, 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.