Patents by Inventor Lia A. Crede

Lia A. Crede 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).

  • Methods of forming stable dispersions of photographic materials
    Patent number: 5158863
    Abstract: The invention is performed by providing a first flow of water and surfactant, a second flow comprising solvent, base and photographic material, and mixing said first and second streams and either simultaneously or immediately following thereof neutralizing said streams to prevent hydrolysis of a hydrolyzable surfactant and/or premature precipitation of particles before neutralization. The streams then may be immediately treated for formation into photographic materials. In a preferred method the first and second stream may be brought together immediately prior to a mixer with addition of acid directly into the mixer to neutralize the dispersion of fine particles.
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: October 27, 1992
    Assignee: Eastman Kodak Company
    Inventors: Pranab Bagchi, James T. Beck, Lia A. Crede
  • Methods of forming stable dispersions of photographic materials
    Patent number: 4990431
    Abstract: The invention is performed by providing a first flow of water and surfactant, a second flow comprising solvent, base and photographic material, and mixing said first and second streams and either simultaneously or immediately following thereof neutralizing said streams to prevent hydrolysis of a hydrolyzable surfactant and/or premature precipitation of particles before neutralization. The streams then may be immediately treated for formation into photographic materials. In a preferred method the first and second stream may be brought together immediately prior to a mixer with addition of acid directly into the mixer to neutralize the dispersion of fine particles.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: February 5, 1991
    Assignee: Eastman Kodak Company
    Inventors: Pranab Bagchi, James T. Beck, Lia A. Crede