Chemistry: analytical and immunological testing – Tracers or tags
Reexamination Certificate
2005-12-20
2005-12-20
Snay, Jeffrey R. (Department: 1743)
Chemistry: analytical and immunological testing
Tracers or tags
C436S172000
Reexamination Certificate
active
06977177
ABSTRACT:
A method for marking a liquid petroleum hydrocarbon. The method comprises adding to the liquid petroleum hydrocarbon at least one substituted anthraquinone dye having formula (I)wherein R1and R2independently are hydrogen, hydroxy, OR11, amino or NR11R12; R3and R5independently are alkyl, aryl, aralkyl, heteroalkyl or heterocyclic; R4and R6independently are hydrogen or alkyl; R7, R8, R9and R10independently are cyano, nitro or hydrogen, provided that at least two of R7, R8, R9and R10are cyano or nitro; R11is alkyl, aryl, aralkyl, heteroalkyl, heterocyclic or alkanoyl; R12is hydrogen or alkyl; and wherein the substituted anthraquinone dye(s) has an absorption maximum in the range from 690 nm to 1000 nm.
REFERENCES:
patent: 2611772 (1952-09-01), Allen et al.
patent: 2727045 (1955-12-01), McSheahy
patent: 3164449 (1965-01-01), Buxbaum et al.
patent: 3847953 (1974-11-01), Sill et al.
patent: 3883568 (1975-05-01), Turner et al.
patent: 4755012 (1988-07-01), Kojima
patent: 4764474 (1988-08-01), Orelup
patent: 5304493 (1994-04-01), Nowak
patent: 5342974 (1994-08-01), Ohyama et al.
patent: 5525516 (1996-06-01), Krutak et al.
patent: 5627077 (1997-05-01), Dyllick-Brenzinger et al.
patent: 5663386 (1997-09-01), Raulfs et al.
patent: 5804447 (1998-09-01), Albert et al.
patent: 5942292 (1999-08-01), Yoneda et al.
patent: 6274381 (2001-08-01), Pauls et al.
patent: 6312958 (2001-11-01), Meyer et al.
patent: 6811575 (2004-11-01), Ho et al.
patent: 2004/0110302 (2004-06-01), Vamvakaris et al.
patent: 0 201 368 (1986-03-01), None
patent: 61-246258 (1986-11-01), None
patent: 61-291652 (1986-12-01), None
patent: 62-15260 (1987-01-01), None
U.S. Appl. No. 10/308,618, filed Dec. 3, 2002, Chen et al.
U.S. Appl. No. 10/857,394, filed May 28, 2004, Baxter et al.
Baxter David Roderick
Ho Kim Sang
Crimaldi Kenneth
Rohm and Haas Company
Snay Jeffrey R.
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