N-acyl-S-(2-hydroxyalkyl) cysteines, their preparation and their use as intermediates for the preparation of synthetic immuno-adjuvants and synthetic vaccines

Granted: Dec 23, 1997 Filed: Jun 7, 1995

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.