Patents by Inventor Michel Serge Lefebvre

Michel Serge Lefebvre 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).

  • Process for coloring surfaces
    Patent number: 4040353
    Abstract: The invention relates to a process for coloring surfaces in such a way that two juxtaposed colored areas cannot be visually perceived as distinct from one another unless their distance from the eye drops below a predetermined distance. The first area is colored by juxtapositioning unitary zones of at least two colors and the second area is colored by the resultant color of the optical mixture of the colors used for the first area. One important application of the invention is in display advertising.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: August 9, 1977
    Assignee: OPI Metriservice, Societe Anonyme
    Inventor: Michel Serge Lefebvre