Patents by Inventor Cyrille Sironval

Cyrille Sironval 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).

  • Fixing and retrieving recorded information produced by means of photosensitive material of biological origin
    Patent number: 4065310
    Abstract: A method of recording and reproducing information using a photographic recording material which comprises a support bearing at least one photosensitive layer containing photoactive protochlorophyll(ide)-apoprotein complex. The layer is exposed to light of the wavelength region absorbed by the complex in a pattern representing information to be recorded and forms a corresponding pattern of differentiations in light-absorption and fluorescence-emission characteristics. The latter can be scanned to reproduce the information.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: December 27, 1977
    Inventors: Esther Dujardin, Ysbrand Kuiper, Rene Cremer, Cyrille Sironval