Mixtures of reaction products based on epoxides, primary amines and fatty acids and of aminoplast precondensates, their preparation and their use as leather dressings

Granted: Feb 1, 1983 Filed: Jul 2, 1981

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.