Granted Patent
Utility
US 4,286,107 · App. 06/193,325
Silver catalysts used to prepare polyaminopolyphenylmethanes
Inventors:
Edward T. Marquis, Lewis W. Watts, Jr.
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Oct 2, 1980
Inventors
Edward T. Marquis
Lewis W. Watts, Jr.
Assignee (at issue)
Texaco 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.