Patents by Inventor John Victor Nelson

John Victor Nelson 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).

  • Photographic coating compositions and photographic elements made therefrom
    Patent number: 5834172
    Abstract: A photographic coating composition comprising an aqueous medium containing a hydrophilic colloid and having dispersed therein solid particles of a yellow filter dye also contains a oxidized developer scavenger of formula III ##STR1## wherein x.sup.1 =hydrogen or a process cleavable group;R.sup.14 =an electron withdrawing and aqueous solubilizing group;R.sup.15 =a substituent group;R.sup.16 =a ballasting group;R.sup.17 =a substituent group;i=1, 2, 3, or 4; andj=1, 2, 3, or 4.The coating composition is stable with regard to crystal growth of the dispersed solid particles of filter dye even when held at coating temperatures (about 45.degree. C.) for several hours.
    Type: Grant
    Filed: February 23, 1996
    Date of Patent: November 10, 1998
    Assignee: Eastman Kodak Company
    Inventors: Paul Leo Zengerle, John Victor Nelson, Mary Christine Brick
  • Combination of yellow filter dye and 4-equivalent pyrazolone magenta coupler
    Patent number: 5695917
    Abstract: A photographic element contains a four-equivalent pyrazolone magenta coupler and a yellow filter dye represented by Formula I. ##STR1## wherein: A is an acidic nucleus selected from the group consisting of benzoylacetonitrile, 2-phenyl-1,1,3-tricyanopropene, 5-pyrazolone, isooxazolone, barbituric acid, thiobarbituric acid, rhodanine, hydantoin, thiohydantoin, oxazolidindione, pyrazolidindione, indandione, pyrazolopyridone, 1,2,3,4-tetrahydroquinolin-2,4-dione, 3-oxo-2,3-dihydrobenzo?d!thiophene-1,1-dioxide and 3-dicynaomethine-2,3-dihydroxybenzo?d!thiophene-1,1-dioxide;L.sup.1-3 each independently represents a substituted or unsubstituted methine group;n is 0 or 1;R.sup.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: December 9, 1997
    Assignee: Eastman Kodak Company
    Inventors: John Victor Nelson, Margaret Jones Helber, Mary Christine Brick