Aromatic polyols made from alkylene glycols and waste streams from the manufacture of dimethyl terephthalate containing methyl p-formylbenzoate

Granted: Apr 24, 1984 Filed: Mar 18, 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.