Patents by Inventor Silas S. Sharp

Silas S. Sharp 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).

  • Patent number: 4127668
    Abstract: Miticidal mixtures containing a macrotetrolide compound represented by the formula ##STR1## wherein R.sub.1, Rd 2, R.sub.3 and R.sub.4 are each selected from the group consisting of ethyl and ethyl, known generically as polynactin and 2-acetoxy-3-n-dodecyl-1,4-naphthoquinone (II) exhibit improved miticidal properties when applied to plants.
    Type: Grant
    Filed: October 20, 1977
    Date of Patent: November 28, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Silas S Sharp
  • Patent number: 4109007
    Abstract: Miticidal mixtures containing a macrotetrolide compound represented by the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each selected from the group consisting of methyl and ethyl, known generically as polynactin and methyl N',N'-dimethyl-N-[(methylcarbamoyl)-oxy]-1-thiooxamimidate (III) known generically as oxamyl, exhibit improved miticidal properties when applied to plants.
    Type: Grant
    Filed: October 20, 1977
    Date of Patent: August 22, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Silas S Sharp
  • Patent number: 3956303
    Abstract: Novel compounds of the formula: ##EQU1## and their use as miticides and mite ovicides, wherein: R.sub.1 is hydrogen, methyl or ethyl;R.sub.2 is methyl, ethyl, methoxy, phenyl, dimethylamino or 2-(dimethylamino)ethyl;R.sub.1 and R.sub.2 can be taken together to form ##EQU2## --(CH.sub.2).sub.n --, or --CH.sub.2 CH(CH.sub.3)--O--CH(CH.sub.3)CH.sub.2 -- where n is 4 or 5, provided that, when R.sub.1 is hydrogen, R.sub.2 must be dimethylamino or 2-(dimethylamino)ethyl.
    Type: Grant
    Filed: August 20, 1974
    Date of Patent: May 11, 1976
    Inventors: Greg A. Bullock, Silas S. Sharp