Patents by Inventor Robert F. Rainville

Robert F. Rainville 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).

  • Patent number: 6183741
    Abstract: The present invention is a process for reducing gelatin insolubles which includes providing a gelatin solution and adding to the gelatin solution amylase in an amount to provide a concentration of amylase of at least 0.1 ppm for a time sufficient to reduce gelatin insolubles. The present invention also provides a gelatin having a Bloom strength of from 60 to 400 and a concentration of amylase of greater than 0.1 ppm.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: February 6, 2001
    Assignee: Eastman Kodak Company
    Inventors: Anne G. Rowlands, Robert F. Rainville
  • Patent number: 6080843
    Abstract: The present invention is a gelatin composed of a high molecular weight fraction (>250,000) of from 0 to 25 wt %, a beta fraction (150,000-250,000) of from 0 to 20 wt % and an alpha fraction (50,000-150,000) of from 15 to 55 wt %. The gelatin has a Gel strength of from 150 to 350 g Bloom and a concentration of protease of greater than 10 ppb and an absorbance of at least 0.069 at 420 nm. The present invention also is a process for the manufacture of photographic gelatin. The process begins by liquefying or slurrying the residual ossein. Protease is added to the gelatin solution or ossein slurry to a concentration of at least 10 ppb to form a mixture. The mixture is reacted for a time sufficient to achieve a viscosity of less than 9 cps (6.16% gel concentration at 104.degree. F.) and the protease is inactivated. The mixture is clarified to form a gelatin solution wherein the gelatin is of high quality.
    Type: Grant
    Filed: November 3, 1998
    Date of Patent: June 27, 2000
    Assignee: Eastman Kodak Company
    Inventors: Robert F. Rainville, Anne G. Rowlands, Deborah J. Burrows, Peter Noble