N-3, 3-dimethylbutyl-L-aspartic acid and esters thereof, the process of preparing the same, and the process for preparing N-(N-(3,3-dimethylbutyl) -.alpha. L-aspartyl)-L- phenylalanine 1-methyl ester therefrom

Granted: Jun 20, 2000 Filed: Dec 24, 1998

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.