Patents by Inventor Claude G. Ceintrey

Claude G. Ceintrey 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).

  • Photochromic composition containing indoline spirobenzopyran and copolymer of PVC and imaged product thereof
    Patent number: 4237207
    Abstract: A photochromic spiropyran compound is uniformly dispersed in a vinyl chloride homopolymer or copolymer resin binder. The resulting photosensitive composition provides an image which is highly stable against exposure to light, darkness, and heat when the composition is exposed to a light source emitting radiation of wavelength which includes the absorption band of the spiropyran compound.
    Type: Grant
    Filed: July 20, 1979
    Date of Patent: December 2, 1980
    Assignee: La Cellophane
    Inventor: Claude G. Ceintrey
  • Photosensitive compositions and recording materials and processes utilizing same
    Patent number: 4172725
    Abstract: A photochromic spiropyran compound is uniformly dispersed in a vinyl chloride homopolymer or copolymer resin binder. The resulting photosensitive composition provides an image which is highly stable against exposure to light, darkness, and heat when the composition is exposed to a light source emitting radiation of wavelength which includes the absorption band of the spiropyran compound.
    Type: Grant
    Filed: January 3, 1978
    Date of Patent: October 30, 1979
    Assignee: La Cellophane
    Inventor: Claude G. Ceintrey
  • Photosensitive compositions and recording materials and processes utilizing same
    Patent number: 4171980
    Abstract: A photochromic spiropyran compound is uniformly dispersed in a vinyl chloride homopolymer or copolymer resin binder. The resulting photosensitive composition provides an image which is highly stable against exposure to light, darkness, and heat when the composition is exposed to a light source emitting radiation of wavelength which includes the absorption band of the spiropyran compound.
    Type: Grant
    Filed: January 3, 1978
    Date of Patent: October 23, 1979
    Assignee: La Cellophane
    Inventor: Claude G. Ceintrey