Patents by Inventor Kyuji Ohta

Kyuji Ohta 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).

  • Bacteriostatic biologically active compositions
    Patent number: 4156725
    Abstract: Novel pteridines of formula (I), ##STR1## wherein R is an optionally substituted phenoxyalkyl group, and R.sup.1 and R.sup.2 are the same or different and each is a lower alkyl group or R.sup.1 and R.sup.2, together with the carbon atom in the pteridine ring structure, form a spirocycloalkyl ring system having 4 to 6 carbon atoms outside the pteridine ring structure, and their method of preparation.The above compounds have bacteriostatic activity.
    Type: Grant
    Filed: May 2, 1977
    Date of Patent: May 29, 1979
    Assignee: Burroughs Wellcome Co.
    Inventors: Hamish C. S. Wood, Kyuji Ohta
  • Pteridine compounds
    Patent number: 4042589
    Abstract: Novel pteridines of formula (I), ##STR1## wherein R is an optionally substituted phenoxyalkyl group, and R.sup.1 and R.sup.2 are the same or different and each is a lower alkyl group or R.sup.1 and R.sup.2, together with the carbon atom, in the pteridine ring structure, form a spirocycloalkyl ring system having 4 to 6 carbon atoms outside the pteridine ring structure, and their method of preparation.The above compounds have bacteriostatic activity.
    Type: Grant
    Filed: October 14, 1975
    Date of Patent: August 16, 1977
    Assignee: Burroughs Wellcome Co.
    Inventors: Hamish Christopher Swan Wood, Kyuji Ohta
  • 5-Nitropyrimidines
    Patent number: 3933820
    Abstract: Novel pteridines of formula (I), ##SPC1##wherein R is an optionally substituted phenoxyalkyl group, and R.sup.1 and R.sup.2 are the same or different and each is a lower alkyl group or R.sup.1 and R.sup.2, together with the carbon atom in the pteridine ring structure, form a spirocycloalkyl ring system having 4 to 6 carbon atoms outside the pteridine ring structure,And their method of preparation.The above compounds have bacteriostatic activity.
    Type: Grant
    Filed: July 30, 1973
    Date of Patent: January 20, 1976
    Assignee: Burroughs Wellcome Co.
    Inventors: Hamish Christopher Swan Wood, Kyuji Ohta