Granted Patent
Utility
US 4,263,446 · App. 06/043,788
Process for making 3-(3,5-dialkyl-4-hydroxyphenyl)propionate esters of hydroxyalkyloxamides
Inventors:
Edward L. Wheeler, Elmar H. Jancis
Patented Case
View Patent ↗
Granted: Apr 21, 1981
Filed: May 30, 1979
Inventors
Edward L. Wheeler
Elmar H. Jancis
Assignee (at issue)
Uniroyal Ltd.
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.