Polyoxyalkylene ethers of glycerin or 1,2-propanediol, esterified with fatty acid and/or isostearic acid, their synthesis and use as thickening or solubilizing agents

Granted: Sep 30, 1986 Filed: Oct 24, 1983

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.