Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Structured visual or optical indicator – per se
Reexamination Certificate
2011-08-09
2011-08-09
Gakh, Yelena G (Department: 1777)
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Structured visual or optical indicator, per se
C422S400000, C422S401000, C422S402000, C422S403000
Reexamination Certificate
active
07993604
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.
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Dressaire Emilie
Gustavson Gale H.
Hal Ronald Van
Mullins Oliver
Raghuraman Bhavani
Gakh Yelena G
Laffey Brigid
Raybaud Helene
Schlumberger Technology Corporation
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