Patents by Inventor Richard D. Streeper

Richard D. Streeper 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 imageable composition containing a hexaaromaticbimidazole, a leuco dye and an oxygen-sensitizing compound
    Patent number: 4090877
    Abstract: An imageable composition comprising (a) a leuco form of dye, (b) a hexaaromaticbiimidazole that effects the conversion of said dye to a differently colored compound when exposed to electromagnetic radiation at a wavelength of from about 250 to 400 nanometers, and (c) an oxygen sensitizing compound in an amount such that, upon exposure to electromagnetic radiation at a wavelength of from about 400 to 700 nanometers in the presence of oxygen, said dye is stabilized in its leuco form.
    Type: Grant
    Filed: August 15, 1977
    Date of Patent: May 23, 1978
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard D. Streeper