Patent classifications
C
CHEMISTRY; METALLURGY
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C01
INORGANIC CHEMISTRY
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C01B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF;; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
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25/00
Phosphorus; Compounds thereof
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C01B25/16
Oxyacids of phosphorus; Salts thereof
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C01B25/45
containing plural metal, or metal and ammonium
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