Patents by Inventor Carl H. Eldredge

Carl H. Eldredge 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).

  • Acidic adhesive compositions and self-processing photographic products containing same
    Patent number: 4357408
    Abstract: Adhesive compositions are disclosed which are particularly useful as mask adhesives in instant photographic products. These adhesives provide high strength permanent bonds while greatly improving border quality around image areas after imagewise exposure and development. These adhesive compositions comprise a polymeric acidic component having at least 3 milliequivalents of acid per gram of polymer, and a substantially immobile, blocked photographic development restrainer or a substantially immobile, blocked competing photographic developer.
    Type: Grant
    Filed: November 20, 1980
    Date of Patent: November 2, 1982
    Assignee: Eastman Kodak Company
    Inventors: Robert R. Rose, Carl H. Eldredge
  • Yellow azopyrazoline dye releasing redox compounds for photographic color transfer
    Patent number: 4013633
    Abstract: A photosensitive element comprising a support having thereon at least one photosensitive silver halide emulsion layer and one of said layers having associated therewith a yellow image dye-releasing compound having a formula as follows ##STR1## wherein Car represents a sulfonamidophenol or sulfonamidonaphthol carrier moiety which, as a function of oxidation under alkaline conditions, releases a diffusible dye from said compound.X represents a bivalent linking group of the formula --R.sup.1 --L.sub.n --R.sup.1.sub.p -- where each R.sup.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: March 22, 1977
    Assignee: Eastman Kodak Company
    Inventors: Jan R. Haase, Carl H. Eldredge, Richard A. Landholm
  • Magenta image-providing phenylazonaphthyl dyes
    Patent number: 3931144
    Abstract: A nondiffusible sulfonamide compound which is alkali-cleavable upon oxidation to release a diffusible magenta color-providing moiety from a benzene nucleus thereof, said compound having a formula as follows: ##SPC1##WhereinBall represents an organic ballasting group.Y represents the carbon atoms necessary to complete a benzene or naphthalene nucleus;X represents a bivalent linking group;R represents hydrogen or alkyl;J represents sulfonyl or carbonyl;M and q each represent an integer having a value of 0 or 1;R.sup.
    Type: Grant
    Filed: February 5, 1974
    Date of Patent: January 6, 1976
    Assignee: Eastman Kodak Company
    Inventors: Carl H. Eldredge, Jan R. Haase, Richard A. Landholm