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Permaphase Trademarks
PERMAPHASE
chemicals, namely superficially porous spherical particles for use as chromatographic column packing material
Cancelled
·
September 13, 1993
·
74436154
·
PERMAPHASE
SUPERFICIALLY POROUS SPHERICAL PARTICLES FOR USE AS CHROMATOGRAPHIC COLUMN PACKING MATERIAL
Expired
·
June 3, 1971
·
72393799
·
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