Patents by Inventor Robert L. Spraggins

Robert L. Spraggins 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).

  • Valuable medicinial prostaglandin compounds prepared from material isolated from the sea
    Patent number: 4045577
    Abstract: Novel compounds of the formula ##STR1## wherein R.sub.1 is hydrogen or alkyl, R.sub.2 is hydrogen or acyl, the diastereomers and the pharmaceutically acceptable salts. The compounds are prepared by the hydrogenation and epimerization of naturally occurring inactive prostaglandins and they are useful as antihypertensive agents and as intermediates for preparing other prostaglandins possessing therapeutic properties. SPThis is a continuation, of application Ser. No. 154,193, filed June 17, 1971, now abandoned.
    Type: Grant
    Filed: July 18, 1975
    Date of Patent: August 30, 1977
    Assignee: Alza Corporation
    Inventor: Robert L. Spraggins
  • Novel compounds from coral
    Patent number: 3976679
    Abstract: Novel compounds of the formula ##SPC1##Wherein R.sub.1 is hydrogen or methyl, R.sub. 2 is hydrogen or acetyl and the diester thereof. The compounds are useful as intermediates for preparing biologically active prostaglandins and they are useful singly as antibacterial agents.
    Type: Grant
    Filed: July 23, 1970
    Date of Patent: August 24, 1976
    Inventors: Alfred J. Weinheimer, Robert L. Spraggins