Granted Patent
Utility
US 4,904,741 · App. 07/012,230
Polymers with amino-methyl-propene-2-yl groups contaiing electron-withdrawing groups
Inventors:
Phillip B. Valkovich, Kechia J. Chou
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Feb 9, 1987
Inventors
Phillip B. Valkovich
Kechia J. Chou
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.