Patents by Inventor Chin H. Chen

Chin H. Chen 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: 6020078
    Abstract: An organic EL device, including an anode and a cathode, and at least one organic luminescent layer containing a compound of the formula: ##STR1## wherein: X=S, or OR.sub.1, and R.sub.2 are individually alkyl of from 1 to 20 carbon atoms, aryl or carbocyclic systems;R.sub.3, and R.sub.4 are individually alkyl of from 1 to 10 carbon atoms, or a branched or unbranched 5 or 6 member substituent ring connecting with R.sub.1, R.sub.2 respectively; andR.sub.5 and R.sub.6 are individually alkyl of from 1 to 20 carbon atoms, which are branched or unbranched.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: February 1, 2000
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, Ching W. Tang, Jianmin Shi, Kevin P. Klubek
  • Patent number: 6010841
    Abstract: A photographic element comprises at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of formulaZ-(L-XY).sub.kwherein:Z is a light absorbing group;L is a linking group containing a least one C, N, S, or O atom; andk is 1 or 2; andXY represents a fragmentable electron donor moiety wherein:1) XY has a an oxidation potential between 0 and about 1.4 V;2) X is an electron donor group;3) Y is a leaving group other than hydrogen; and4) the oxidized form of XY undergoes a bond cleavage reaction to give the radical X.sup..cndot. and the leaving fragment Y.In a preferred embodiment the radical X.sup..cndot. has an oxidation potential of .ltoreq.-0.7 V.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: January 4, 2000
    Assignee: Eastman Kodak Company
    Inventors: Samir Y. Farid, Jerome R. Lenhard, Chin H. Chen, Annabel A. Muenter, Ian R. Gould, Stephen A. Godleski, Paul A. Zielinski
  • Patent number: 5972247
    Abstract: An organic EL device including an anode, a cathode, and an organic electroluminescent element between the anode and the cathode; the organic electroluminescent element includes an organic material or a mixture thereof of 9,10-bis(3'5'-diaryl)phenyl anthracene derivatives.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: October 26, 1999
    Assignee: Eastman Kodak Company
    Inventors: Jianmin Shi, Chin H. Chen, Kevin P. Klubek
  • Patent number: 5935721
    Abstract: An organic EL device comprising an anode, a cathode, and an organic electroluminescent element between the anode and the cathode; the organic electroluminescent element includes an organic material or a mixture thereof of 9,10-di-(2-naphthyl)anthracene derivatives.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: August 10, 1999
    Assignee: Eastman Kodak Company
    Inventors: Jianmin Shi, Ching W. Tang, Chin H. Chen
  • Patent number: 5935720
    Abstract: An organic EL device, includes an anode and a cathode, and at least one organic luminescent medium containing a compound of the formula: ##STR1## wherein: R.sub.1, and R.sub.2 are individually alkyl of from 1 to 20 carbon atoms, aryl, carbocyclic and other heterocyclic systems; andR.sub.3, and R.sub.4 are individually alkyl of from 1 to 10 carbon atoms, and a branched or unbranched 5 or 6 member substituent ring connecting with R.sub.1, R.sub.2 respectively; andR.sub.5 is alkyl of from 2-20 carbon atoms; sterically hindered aryl and heteroaryl; andR.sub.6 is alkyl of from 1 to 10 carbon atoms, and a 5 or 6-member carbocyclic ring connecting with R.sub.5.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: August 10, 1999
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, Ching W. Tang, Jianmin Shi
  • Patent number: 5928802
    Abstract: An organic EL device, includes an anode, cathode, and at least one organic luminescent layer including a compound of the formula: ##STR1## where: n is an integer of 2 or 3;M is a divalent metal or a trivalent metal;G is a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group, both the aryl and the heteroaryl groups having 6 to 24 carbon atoms, wherein the substituted aryl or heteroaryl group is an alkyl, haloalkyl group having 1-8 carbon atoms, an alkoxy or haloalkoxy group having 1-18 carbon atoms, halogen, cyano, amino, amido, sulfonyl, carbonyl, aryl, or heteroaryl;R.sup.1 and R.sup.2 are individually hydrogen, an alkyl or haloalkyl group having 1-18 carbon atoms, halogen, cyano, amono, amido, sulfonyl, carbonyl, and 5-24 atoms necessary to complete a fused aromatic ring.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: July 27, 1999
    Assignee: Eastman Kodak Company
    Inventors: Jianmin Shi, Chin H. Chen
  • Patent number: 5908581
    Abstract: A red fluorescent material includes a compound of the formula: ##STR1## wherein: R.sub.1, and R.sub.2 are individually alkyl of from 1 to 20 carbon atoms, aryl, carbocyclic and other heterocyclic systems; andR.sub.3, and R.sub.4 are individually alkyl of from 1 to 10 carbon atoms, and a branched or unbranched 5 or 6 member substituent ring connecting with R.sub.1, R.sub.2 respectively; andR.sub.5 is alkyl of from 2-20 carbon atoms; sterically hindered aryl and heteroaryl; andR.sub.6 is alkyl of from 1 to 10 carbon atoms, and a 5 or 6-member carbocyclic ring connecting with R.sub.5.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: June 1, 1999
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, Kevin P. Klubek, Jianmin Shi
  • Patent number: 5755999
    Abstract: A luminescent material including a compound of the formula: ##STR1## where: n is an integer of 2 or 3;M is a divalent metal or a trivalent metal;G is a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group, both the aryl and the heteroaryl groups having 6 to 24 carbon atoms, wherein the substituted aryl or heteroaryl group is an alkyl, haloalkyl group having 1-8 carbon atoms, an alkoxy or haloalkoxy group having 1-18 carbon atoms, halogen, cyano, amino, amido, sulfonyl, carbonyl, aryl, or heteroaryl; andR.sup.1 and R.sup.2 are individually hydrogen, an alkyl or haloalkyl group having 1-18 carbon atoms, halogen, cyano, amono, amido, sulfonyl, carbonyl, and 5-24 atoms necessary to complete a fused aromatic ring.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: May 26, 1998
    Assignee: Eastman Kodak Company
    Inventors: Jianmin Shi, Chin H. Chen, Kevin P. Klubek
  • Patent number: 5747235
    Abstract: A photographic element comprising at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula: ##STR1## wherein A is a silver halide adsorptive group that contains at least one atom of N, S, Se, or Te that promotes adsorption to silver halide, and L represents a linking group containing at least one C, N, S or O atom, k is 1 or 2, and XY is an fragmentable electron donor moiety in which X is an electron donor group and Y is a leaving group other than hydrogen, and wherein:1) XY has an oxidation potential between 0 and about 1-4 V; and2) the oxidized form of XY undergoes a bond cleavage reaction to give the radical X.sup..cndot. and the leaving fragment Y.In a preferred embodiment of the invention, the radical X.sup..cndot. has an oxidation potential .ltoreq.-0.7V.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: May 5, 1998
    Assignee: Eastman Kodak Company
    Inventors: Samir Y. Farid, Jerome R. Lenhard, Chin H. Chen, Annabel A. Muenter, Ian R. Gould, Stephen A. Godleski, Paul A. Zielinski
  • Patent number: 5747236
    Abstract: A photographic element comprises a support and at least one silver halide emulsion layer in which the silver halide is sensitized with a fragmentable electron donor of the formula X--Y, wherein X is an electron donor moiety and Y is a leaving group other than hydrogen, and wherein:1) X--Y has an oxidation potential between 0 and about 1.4 V; and2) the oxidized form of X--Y undergoes a bond cleavage reaction to give the radical X.sup..cndot. and the leaving fragment Y.In a preferred embodiment of the invention, the radical X.sup..cndot. has an oxidation potential .ltoreq.-0.7V.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: May 5, 1998
    Assignee: Eastman Kodak Company
    Inventors: Samir Y. Farid, Jerome R. Lenhard, Chin H. Chen, Annabel A. Muenter, Ian R. Gould, Stephen A. Godleski, Paul A. Zielinski, Charles H. Weidner
  • Patent number: 5554450
    Abstract: An organic electroluminescent device which includes an anode and a cathode, and an organic electroluminescent element disposed between the anode and cathode. The organic electroluminescent element has at least one hole transporting layer. The hole transport layer includes a polyaromatic amine of the formula: ##STR1## where n is equal to 3, 4, 5, or 6;R.sup.1 is selected from the group consisting of hydrogen, alkyl, aryl and substituted aryl;R.sup.2 is selected from the group consisting of hydrogen, alkyl, aryl and substituted aryl; andR is selected from the group consisting of hydrogen, and alkyl.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: September 10, 1996
    Assignee: Eastman Kodak Company
    Inventors: Jianmin Shi, Chin H. Chen, Steven A. Van Slyke, Ching W. Tang
  • Patent number: 5236797
    Abstract: Electrophotographic elements contain certain chemical compounds as electron-transport agents, which are substituted derivatives of phospha-2,5-cyclohexadiene. These compounds have good solubility or dispersibility in organic solvents and polymeric binders, and they exhibit good electron-transport properties in electrophotographic elements.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: August 17, 1993
    Assignee: Eastman Kodak Company
    Inventors: Teh-Ming Kung, Chin H. Chen
  • Patent number: 5103038
    Abstract: Novel tetrasubstituted dicyanomethylene cyclopentadienes are provided which have utility as electron-transport agents in positively-charged electrophotographic elements. The compounds are characterized by the formula: ##STR1## wherein: R.sub.1 and R.sub.4 are each independently selected from the group consisting of lower alkyl, halogen and cyano;R.sub.2 and R.sub.3 are each independently selected from the group consisting of aryl and substituted aryl; andZ and Z' are each an electron withdrawing group.
    Type: Grant
    Filed: November 20, 1989
    Date of Patent: April 7, 1992
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, John L. Fox, Yann Hung
  • Patent number: 5061569
    Abstract: An internal junction organic electroluminescent device is disclosed comprising in sequence, an anode, an organic hold injecting and transporting zone, an organic electron injecting and transporting zone, and a cathode. The hole injecting and transporting zone includes a tertiary amine containing at least two tertiary amine moieties and including attached to a tertiary amine nitrogen atom an aromatic moiety containing at least two fused aromatic rings.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: October 29, 1991
    Assignee: Eastman Kodak Company
    Inventors: Steven A. VanSlyke, Ching W. Tang, Michael E. O'Brien, Chin H. Chen
  • Patent number: 4992349
    Abstract: Cyclic bis-dicarboximides are employed as electron transport agents in photoconductor elements. Such compounds are characterized by the formula: ##STR1## wherein: R.sup.1 and R.sup.2, which may be the same or different, represent aryl, or aryl substituted with alkyl, alkoxy, perfluoroalkyl or perfluoroalkoxy groups having 2 to 20 carbon atoms; sulfonyl; sulfone; sulfonamide; nitrile; or nitro groups;R.sup.3, R.sup.4, R.sup.5, and R.sup.6, which may be the same or different, represent hydrogen, alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms, or halogen; andn is 0 to 3.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: February 12, 1991
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, Yann Hung
  • Patent number: 4973694
    Abstract: A 6-tertiary amino-2-(Z.dbd.CH--)benzofuran dye is disclosed, where Z represents the atoms providing an electron withdrawing group and a conjugated methine linkage completing a resonant dye chromophore including the 6-tertiary amino group as an electron donor and the electron withdrawing group as an electron acceptor. The dyes are formed by condensing a 6-tertiary amino-2-formylbenzofuran with an electron withdrawing dye nucleus precursor containing an active methyl or methylene site. The dyes exhibit bathocromically shifted absorption peaks.
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: November 27, 1990
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, John L. Fox
  • Patent number: 4948893
    Abstract: A 6-tertiary amino-2-(Z.dbd.CH--)benzofuran dye is disclosed, where Z represents the atoms providing an electron withdrawing group and a conjugated methine linkage completing a resonant dye chromophore including the 6-tertiary amino group as an electron donor and the electron withdrawing group as an electron acceptor. The dyes are formed by condensing a 6-tertiary amino-2-formylbenzofuran with an electron withdrawing dye nucleus precursor containing an active methyl or methylene site. The dyes exhibit bathochromically shifted absorption peaks.
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: August 14, 1990
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, John L. Fox
  • Patent number: 4948895
    Abstract: A 6-tertiary amino-2-(Z.dbd.CH--)benzofuran dye is disclosed, where Z represents the atoms providing an electron withdrawing group and a conjugated methine linkage completing a resonant dye chromophore including the 6-tertiary amino group as an electron donor and the electron withdrawing group as an electron acceptor. The dyes are formed by condensing a 6-tertiary amino-2-formylbenzofuran with an electron withdrawing dye nucleus precursor containing an active methyl or methylene site. The dyes exhibit bathochromically shifted absorption peaks.
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: August 14, 1990
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, John L. Fox
  • Patent number: D345261
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: March 22, 1994
    Assignee: Berkeley Products, Inc.
    Inventor: Chin H. Chen
  • Patent number: D351290
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: October 11, 1994
    Assignee: Berkeley Products, Inc.
    Inventor: Chin H. Chen