Granted Patent
Utility
US 5,010,156 · App. 07/491,802
Organosolv lignin-modified phenolic resins and method for their preparation
Inventors:
Phillip Michael Cook, Steven Hess
Patented Case
View Patent ↗
Granted: Apr 23, 1991
Filed: Mar 12, 1990
Inventors
Phillip Michael Cook
Steven Hess
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.