3904373 is referenced by 68 patents and cites 3 patents.

Indicators insolubilized by covalent bonding to inorganic carriers for indicating the hydrogen ion concentration, oxidation-reduction state or specific ion concentration in liquid media. Since the indicators are insoluble they do not contaminate the solution tested, and they may be used repeatedly in different media. They replace the well known indicator test papers which consists of a substrate dyed with an indicator. Methods of making the indicators are also provided.

Indicators covalently bound to insoluble carriers
Application Number
Publication Number
Application Date
October 26, 1973
Publication Date
September 9, 1975
Harper Gerald Bruce
Rutherford F Campbell
G01n 33/00
G01n 31/00
G01n 29/02
G01N 31/22
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