Patents by Inventor Colin James Gray

Colin James Gray 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: 5783377
    Abstract: A photographic element having a light sensitive layer and containing a dye of the formula (I): ##STR1## wherein: X.sub.1 and X.sub.2 each independently represents the atoms necessary to complete a 5- or 6-membered heterocyclic nucleus;X.sub.3 represents the atoms necessary to form a 5- or 6-membered ring structure, which may be substituted;R.sub.1 and R.sub.2 each independently represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group;R.sub.3 represents H, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group;r and s independently are 0 or 1; andW represents one or more counterions as needed to balance the charge of the molecule.
    Type: Grant
    Filed: September 4, 1996
    Date of Patent: July 21, 1998
    Assignee: Eastman Kodak Company
    Inventors: John David Mee, Colin James Gray
  • Patent number: 5744295
    Abstract: An antistatic composition comprises a hydrophilic colloid, e.g. gelatin, and a plurality of surface active agents comprising an anionic surface active agent and a cationic surface active agent. At least one of the anionic and cationic surface active agents comprises at least one polyoxyalkylene group. The accumulation of electrostatic charge on an element, e.g a photographic element, may be prevented by coating a surface of the element with an aqueous dispersion of the antistatic composition and drying the coated surface.
    Type: Grant
    Filed: August 30, 1994
    Date of Patent: April 28, 1998
    Assignee: Eastman Kodak Company
    Inventors: Alan Robert Pitt, Julian Claudius Caesar, Colin James Gray
  • Patent number: 5695918
    Abstract: A dye of the formula (I) below, and photographic elements having a light sensitive layer and which element contains such a dye: ##STR1## X.sub.1 and X.sub.2 each independently represent the atoms necessary to complete a 5- or 6-membered heterocyclic nucleus;x and y are, independently, integers from 0 to 3 provided x+y is no greater than 4;p and q each independently represents 0 or 1,each L independently represents a methine group;R.sub.1 and R.sub.2 each independently represents an alkyl group or an aryl group, andR.sub.3 represents an alkyl group, aryl group or heteroaryl group;W1 is a counterion as needed to balance the charge of the molecule.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: December 9, 1997
    Assignee: Eastman Kodak Company
    Inventors: Colin James Gray, John David Mee, Derek David Chapman, Kevin Wallace Williams