Patents by Inventor Peter Shu-Ti Lee

Peter Shu-Ti Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for measuring stable isotopes
    Patent number: 4684805
    Abstract: Spectroscopic measurements of stable isotopes are performed using a tunable lead salt diode laser. The design of the system is based upon the optimization of isotopic spectral lines from two different path lengths in an absorption cell using a single gaseous sample. A short path cell to measure the more abundant species and a long path cell to measure the less abundant species are used. A micrometer adjustment of a path length is used for equalizing spectral line intensities to obtain a measure of isotope enrichment or of absolute isotopic concentration.
    Type: Grant
    Filed: August 21, 1985
    Date of Patent: August 4, 1987
    Assignee: General Motors Corporation
    Inventors: Peter Shu-Ti Lee, Richard F. Majkowski, Dale L. Partin