Patents by Inventor William Bryker

William Bryker 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 for resolution of D,L-alpha-phenethylamine with D(-)mandelic acid
    Patent number: 4983771
    Abstract: A process for recovering optically pure D(+)alpha-phenethylamine which comprises addition of the racemic mixture to a water/acid solution, and as a resolving agent, optically active D(-)mandelic acid. An optically pure D(+)alpha-PEA mandelate salt is formed, crystallized out of solution and washed with water. The salt is broken with sodium hydroxide, or a similar base, and the D(+)PEA liberated is extracted with toluene. The D(+) PEA recovered by vacuum distillation is recovered in high yield, shows high enantiomeric purity.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: January 8, 1991
    Assignee: Hexcel Corporation
    Inventors: William Bryker, Luis A. Avila