Granted Patent
Utility
US 4,906,744 · App. 07/307,211
Water-soluble ethers substituted with alkenyl or alkyl succinic acid esters
Patented Case
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Granted: Mar 6, 1990
Filed: Feb 3, 1989
Assignee (at issue)
Henkel Limited
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.