Chin Hsiu Chen

US Patent:

60200782, Feb 1, 2000

Filed:

Dec 18, 1998

Appl. No.:

9/216238

Inventors:

Chin H. Chen - Mendon NY
Ching W. Tang - Rochester NY
Jianmin Shi - Webster NY
Kevin P. Klubek - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H05B 3314

US Classification:

428690

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 O R. 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; and R. sub. 5 and R. sub. 6 are individually alkyl of from 1 to 20 carbon atoms, which are branched or unbranched.

US Patent:

48123935, Mar 14, 1989

Filed:

Jan 31, 1986

Appl. No.:

6/824765

Inventors:

Ramanuj Goswami - Rochester NY
Chin H. Chen - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G01N 3354
C12Q 100

US Classification:

435 4

Abstract:

Substituted 4-oxo-4H-benz-[d,e] anthracenes are fluorescent dyes which are useful in biomedical studies and analytical determinations. They are particularly useful in assays for living organisms, e. g. microorganisms, carried out at a pH of 9 or less. For these determinations, the fluorescent dyes can be attached to reducible compounds which will release the dye upon reduction. Alternatively, these dyes can be used in assays for hydrolytic enzymes or biological cells containing these enzymes. For these determinations, the dyes are attached to blocking groups.

US Patent:

49736949, Nov 27, 1990

Filed:

Aug 17, 1989

Appl. No.:

7/394905

Inventors:

Chin H. Chen - Fairport NY
John L. Fox - Baltimore MD

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

C07D491106
C07D40706

US Classification:

546 66

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.

US Patent:

51030381, Apr 7, 1992

Filed:

Nov 20, 1989

Appl. No.:

7/438813

Inventors:

Chin H. Chen - Fairport NY
John L. Fox - Baltimore MD
Yann Hung - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

C07C25531
C07C25550

US Classification:

558426

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; and Z and Z' are each an electron withdrawing group.

US Patent:

48761753, Oct 24, 1989

Filed:

May 9, 1988

Appl. No.:

7/191947

Inventors:

Chin H. Chen - Fairport NY
John L. Fox - Baltimore MD
Donald P. Specht - Rochester NY
Samir Y. Farid - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 172

US Classification:

430281

Abstract:

A photographic imaging system is disclosed comprised of a hardenable organic component containing ethylenic unsaturation sites and coinitiators for ethylenic addition. The coinitiators include an activator and a photosensitizer. The photosensitizer is a 6-tertiary amino-2-(Z--CH. dbd. )benzofuran dye, where Z represents the atoms providing an electron withdrawing carbonyl or sulfonyl group and completing a conjugated methine linkage extending from the electron withdrawing carbonyl group through the benzofuran to the electron donating 6-tertiary amino substituent to form a resonant dye chromophore. The photosensitizers bathochromically extend exposure response of the imaging system.

US Patent:

49923498, Feb 12, 1991

Filed:

Nov 6, 1989

Appl. No.:

7/432018

Inventors:

Chin H. Chen - Fairport NY
Yann Hung - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03G 514

US Classification:

430 58

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; and n is 0 to 3.

US Patent:

49279270, May 22, 1990

Filed:

Dec 2, 1988

Appl. No.:

7/278993

Inventors:

Ramanuj Goswami - Rochester NY
Chin H. Chen - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

C07C 9718
C07C 5022
C07C 5038

US Classification:

544106

Abstract:

Substituted 4-oxo-4H-benz-[d,e]anthracenes are fluorescent dyes which are useful in biomedical studies and analytical determinations. They are particularly useful in assays for living organisms, e. g. microorganisms, carried out at a pH of 9 or less. For these determinations, the fluorescent dyes can be attached to reducible compounds which will release the dye upon reduction. Alternatively, these dyes can be used in assays for hydrolytic enzymes or biological cells containing these enzymes. For these determinations, the dyes are attached to blocking groups.

US Patent:

57567409, May 26, 1998

Filed:

Apr 8, 1992

Appl. No.:

7/865165

Inventors:

Lal Chand Vishwakarma - Rochester NY
Chin Hsin Chen - Mendon NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

C07D40100
C07D40300
C07D41700
C07D23504
C07D23520
C07D209148

US Classification:

544300

Abstract:

A process for the preparation of photographic binary sensitizing dyes, which comprise two separate, nonconjugated chromophores, one of which has the capability of adsorbing to a silver halide grain surface, the other of which is substantially non-adsorbing to silver halide. The process comprises reacting two dye compounds in a solvent in the presence of a 2-halo-1-alkylpyridinium salt and a 4-dialkylaminopyridine.