Patents by Inventor Stella S. T. Yu

Stella S. T. Yu 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).

  • Alkoxy-substituted dihydrobenzopyran-2-carboxylate derivatives
    Patent number: 4889871
    Abstract: This invention encompasses compounds of Formula 1 and the pharmaceutically acceptable salts thereof. ##STR1## wherein R.sup.1 represents alkyl having 2-6 carbon atoms;R.sup.2 represents methyl or ethyl;R.sup.3 represents alkyl having 1 to 5 carbon atoms;W represents (CH.sub.2).sub.x where x is 2 to 7, alkylene having 2 to 7 carbon atoms, alkenylene having 3 to 7 carbon atoms, alkynylene having 3 to 7 carbon atoms, or cyclopentyl;R.sup.4 represents hydrogen, alkyl having 2-5 carbon atoms, alkenyl having 2 to 5 carbon atoms, or alkynyl having 2 to 5 carbon atoms;Q represents oxygen or CH.sub.2 ;B represents CH.sub.2, C.dbd.O or CH--OH;R.sup.5 represents hydrogen, alkyl having 1 to 6 carbon atoms, or R.sup.5 and R.sup.6 together optionally represent a carbon to carbon bond; orR.sup.5 represents alkanoyl having 2 to 4 carbon atoms, carboxy, alkoxycarbonyl, or (CH.sub.2)y--CO.sub.2 R.sup.8 wherein y is 0 to 4 and R.sup.8 is hydrogen or alkyl having 1 to 6 carbon atoms; andA represents --Z--CO.sub.2 R.sup.
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: December 26, 1989
    Assignee: G. D. Searle & Co.
    Inventors: Stevan W. Djuric, Robert L. Shone, Stella S. T. Yu
  • [(1H-benzimidazol-2-ylsulfinyl)methyl]-2-pyridinamines
    Patent number: 4772619
    Abstract: This invention relates to [(1H-benzimidazol-2-ylsulfinyl)methyl]-2-pyridinamines that are useful in the treatment and prevention of ulcers.
    Type: Grant
    Filed: July 17, 1986
    Date of Patent: September 20, 1988
    Assignee: G. D. Searle & Co.
    Inventors: Gilbert W. Adelstein, Alan E. Moormann, Stella S. T. Yu
  • 2-[(Imidazo[1,2-a]pyridinylmethyl)sulfinyl]-1H-benzimidazoles
    Patent number: 4687775
    Abstract: This invention relates to 2-[(imidazo[1,2-a]pyridinylmethyl)-sulfinyl]-1H-benzimidazoles that are useful in the treatment and prevention of ulcers.
    Type: Grant
    Filed: July 17, 1986
    Date of Patent: August 18, 1987
    Assignee: G. D. Searle & Co.
    Inventors: Gilbert W. Adelstein, Alan E. Moormann, Stella S. T. Yu
  • Substituted (azacycloalk-2-yl)iminophenols and esters thereof
    Patent number: 4579951
    Abstract: This invention relates to novel substituted (azacycloalk-2-yl)iminophenols that are useful in the treatment of diarrhea.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: April 1, 1986
    Assignee: G. D. Searle & Co.
    Inventors: Barnett S. Pitzele, Stella S. T. Yu, Robert W. Hamilton
  • 2-[(Aminophenyl and amidophenyl)amino]-1-azacycloalkanes having antidiarrheal activity
    Patent number: 4533739
    Abstract: This invention relates to the novel use of certain aromatic substituted amidines as antidiarrheals.
    Type: Grant
    Filed: October 12, 1982
    Date of Patent: August 6, 1985
    Assignee: G. D. Searle & Co.
    Inventors: Barnett S. Pitzele, Stella S. T. Yu, Robert W. Hamilton, Alan E. Moormann