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filingDate 2019-11-11-04:00^^<http://www.w3.org/2001/XMLSchema#date>
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publicationDate 2022-01-27-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber US-2022023832-A1
titleOfInvention Guard column and method for producing guard column
abstract Provided is a guard column including a filling part having a length of 2.0 cm to 3.5 cm formed of a filler, in which the filler is made of porous silica gel having a hydrophilized surface and an average particle size of 1.5 μm to 2.5 μm, and a pressure difference when an aqueous solution is fed at a linear flow rate of 2.1 cm/min is 4.0 MPa or more.
priorityDate 2018-12-10-04:00^^<http://www.w3.org/2001/XMLSchema#date>
type http://data.epo.org/linked-data/def/patent/Publication

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