Patents by Inventor Henry James Gysling

Henry James Gysling 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).

  • Palladium chemical sensitizers for silver halides
    Patent number: 5763154
    Abstract: The invention is generally accomplished providing a silver halide emulsion comprising silver halide grains and a palladium compound represented by Formula I:PdX.sub.2 (TeR.sub.2).sub.2whereinX is Cl, Br, I, NCO, NCS, NCSe, N.sub.3, or O.sub.2 CR'R, R' are alkyl or aryl.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: June 9, 1998
    Assignee: Eastman Kodak Company
    Inventors: Henry James Gysling, Kenneth James Lushington
  • Tellurium complexes as chemical sensitizers for silver halides
    Patent number: 5677120
    Abstract: The invention is generally accomplished providing a silver halide emulsion comprising silver halide grains and a tellurium compound represented by Formula I:TeL.sub.n X.sub.2whereinL is thiourea or substituted thiourea,n is 2 or 4,X is Cl, Br, I, OCN, SCN, SeCN, TeCN, or N.sub.3 orFormula II ##STR1## wherein X is COR, CSR, CNR.sub.2, CR, CAr, PR.sub.2, P(OR).sub.2R is alkyl or aryl.
    Type: Grant
    Filed: May 23, 1996
    Date of Patent: October 14, 1997
    Assignee: Eastman Kodak Company
    Inventors: Kenneth James Lushington, Henry James Gysling
  • Xanthate salts as chemical sensitizers for silver halides
    Patent number: 5667957
    Abstract: The invention is generally accomplished providing to a method of sensitizing silver halide grains comprising providing a silver halide grain and bringing said grain into contact with a compound of Formula I,C.sup.+ {S.sub.2 COR}.sup.- Formula IwhereC is NH.sub.4.sup.+, AR'.sub.4.sup.+ or M.sup.+A is N, P, or AsR' is alkyl or arylM is Li, Na, or K, andR is alkyl or aryl.
    Type: Grant
    Filed: May 23, 1996
    Date of Patent: September 16, 1997
    Assignee: Eastman Kodak Company
    Inventors: Kenneth James Lushington, Henry James Gysling
  • Formazan images by physical development of catalytic metal nuclei image
    Patent number: 4042392
    Abstract: A process for the formation of formazan dye images employing nuclei of metals from Groups VIIIB and/or IB of the periodic table to catalyze the reduction of tetrazolium salts to the corresponding formazan dye by a reducing agent.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: August 16, 1977
    Assignee: Eastman Kodak Company
    Inventors: Henry James Gysling, Mark Lelental