Patents by Inventor Louis Cincotta

Louis Cincotta 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).

  • Photosensitive compositions containing linked spectral sensitizers
    Patent number: 3976493
    Abstract: Spectral sensitivity is imparted to a photosensitive material by novel linked sensitizing dye compounds having an alkylene-amide linking moiety.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: August 24, 1976
    Assignee: Polaroid Corporation
    Inventors: Alan L. Borror, Louis Cincotta
  • Bis-type quaternary salts including benzothiazole and benzimidazole rings and process for preparing dye therewith
    Patent number: 3976640
    Abstract: Novel bis type heterocyclic quaternary salts are provided which are useful in the preparation of various linked cyanine dyes and related compounds.BACKGROUND OF THE INVENTION1. Field of the InventionThis invention relates to chemistry and, more particularly, to novel double or "bis-type" quaternary salts of heterocyclic bases and processes useful in the synthesis of various linked cyanine dyes and related compounds.2. Description of the Prior ArtMost of the reactions leading to cyanine dyes and those compounds related to them are of the condensation type wherein two active dye intermediates react under suitable conditions with the elimination of some simple molecule, such as mineral acid, mercaptan, alcohol, water, aniline or acetanilide.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: August 24, 1976
    Assignee: Polaroid Corporation
    Inventors: Alan L. Borror, Louis Cincotta