Patents by Inventor John W. Lee

John W. Lee 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).

  • 3-(Julolidinyl)-benz[d]isothiazole-1,1-dioxide
    Patent number: 4140689
    Abstract: This invention relates to 3-(julolidinyl)-benz[d]-isothiazole-1,1-dioxide useful as an intermediate in the synthesis of certain 3,3-disubstituted-2,3-dihydrobenz[d]-isothiazole-1,1-dioxide dyes which find utility as, for example, photographic optical filter agents and filter agent precursors.
    Type: Grant
    Filed: September 23, 1977
    Date of Patent: February 20, 1979
    Assignee: Polaroid Corporation
    Inventors: James W. Foley, John W. Lee, Jr.
  • Cyclic amino containing benzisothiazoles
    Patent number: 4139704
    Abstract: This invention relates to 3-(phenyl/naphthyl)benz[d]isothiazole-1,1-dioxides wherein the phenyl or naphthyl substituent possesses an N-heterocyclic moiety in the para position. These compounds are useful as intermediates in the synthesis of certain 3,3-disubstituted-2,3-dihydrobenz[d]isothiazole-1,1-dioxide dyes which find utility as, for example, photographic optical filter agents and filter agent precursors.
    Type: Grant
    Filed: September 23, 1977
    Date of Patent: February 13, 1979
    Assignee: Polaroid Corporation
    Inventors: Alan L. Borror, James W. Foley, John W. Lee, Jr.