Patents by Inventor Derron Ray Stark

Derron Ray Stark 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).

  • Preparation of 2',3'-didehydro-3'-deoxythymidine from 5-methyluridine
    Patent number: 5672698
    Abstract: An economical process, amenable to large-scale production, is disclosed for the preparation of 2',3'-didehydro-3'-deoxythymidine (d4T) from 5-methyluridine. The process employs a novel, 5'-,acyl-2'.alpha.-halo-3'.alpha.-alkanesulfonylthymidine intermediate as well as a highly efficient and practical deprotection, isolation and purification procedure for the d4T product.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: September 30, 1997
    Assignee: Bristol-Myers Squibb Co.
    Inventors: Bang-Chi Chen, Derron Ray Stark, Stephen Richard Baker, Sandra L. Quinlan