Chemistry: analytical and immunological testing – Including titration or ph determination
Reexamination Certificate
2004-02-19
2008-10-07
Gakh, Yelena G (Department: 1797)
Chemistry: analytical and immunological testing
Including titration or ph determination
C436S164000
Reexamination Certificate
active
07432109
ABSTRACT:
An indicator mixture that allows pH measurement over a broader range of pH or to a higher accuracy than available using conventional spectroscopic techniques. In particular, the mixture of the present invention is comprised of two or more reagents such that when combined, the reagent mixture is capable of either detecting: (1) a pH range broader or more accurate than that the reagents individually, or (2) pH more accurately than the reagents individually. Also disclosed are methods of making and using the mixture.
REFERENCES:
patent: 60202359 (1985-12-01), None
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Dressaire Emilie
Gustavson Gale H.
Hal Ronald Van
Mullins Oliver
Raghuraman Bhavani
DeStefanis Esq. Jody Lynn
Gakh Yelena G
Loccisano, Esq. Vincent
McAleenan, Esq. James
Schlumberger Technology Corporation
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