Granted Patent
Utility
US 4,960,699 · App. 07/193,332
Enzymatic depolymerization of coal
Inventors:
Willis A. Wood, Lillian M. Wondrack
Patented Case
View Patent ↗
Granted: Oct 2, 1990
Filed: May 9, 1988
Inventors
Willis A. Wood
Lillian M. Wondrack
Assignee (at issue)
The Salk Institute Biotechnology/Industrial Associates, 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.