Patents by Inventor Alain Dominique M. Sismondi

Alain Dominique M. Sismondi 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).

  • Radiographic element having improved speed to Dmin ratio and manufacturing process thereof
    Patent number: 6235461
    Abstract: The present invention relates to a process for manufacturing a silver halide photographic element comprising the step of adding to a silver halide emulsion (1) an aryl compound having at least two hydroxyl groups and at least one additional substituent represented by a sulfonic group, an alkali metal sulfonate group, a hydroxyl group, a carboxy group or a hydroxymethyl group, and (2) a polyhydroxyalkyl derivative selected from the group consisting of non-hydrogenated polysaccharides having an average molecular weight higher than 10,000 and hydrogenated polysaccharides having an average molecular weight equal to or lower than 10,000. The use of such a combination to increase the speed to Dmin ratio of a silver halide photographic element and a silver halide element comprising such a combination is also claimed.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: May 22, 2001
    Assignee: Tulalip Consultoria Comercial Sociedade Unipessoal S.A.
    Inventors: Alain Dominique M. Sismondi, Marco Serafini