Patent assignee · DE · COMPANY

QIAGEN GmbH

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266Patents
195Active
266Granted
56Portfolio score

Filing activity: Jun 2, 1994 → May 19, 2022 · 74 expiring within 5 years

Most-cited patents

PatentTitleAreaCited byStatus
US7297485B2 Method for nucleic acid amplification that results in low amplification bias Chemistry; Metallurgy 296 Expired
US6977148B2 Multiple displacement amplification Chemistry; Metallurgy 213 Expired
US6617170B2 Method and device for collecting and stabilizing a biological sample Emerging Cross-Sectional Technologies 116 Expired
US7358047B2 Methods of forming circular nucleic acid probes and uses thereof Chemistry; Metallurgy 108 Expired
US6602718B1 Method and device for collecting and stabilizing a biological sample Emerging Cross-Sectional Technologies 90 Expired
US6977153B2 Rolling circle amplification of RNA Chemistry; Metallurgy 83 Expired
US6383393B1 Chromatographic purification and separation process for mixtures of nucleic acids Chemistry; Metallurgy 81 Expired
US5990301A Process for the separation and purification of nucleic acids from biological sources Emerging Cross-Sectional Technologies 75 Expired
US6180778A Process for the separation of double-stranded/single-stranded nucleic acid structures Chemistry; Metallurgy 72 Expired
US7074600B2 Amplification of denatured and stabilized nucleic acids Chemistry; Metallurgy 63 Expired
US6733777B2 Cationic reagents of transfection Human Necessities 61 Expired
US5747663A Process for the depletion or removal of endotoxins Emerging Cross-Sectional Technologies 56 Expired
US6020186A Device and process for isolating nucleic acids from cell suspensions Chemistry; Metallurgy 56 Expired
US6586585B1 Method for the size reduction of high-molecular structures Chemistry; Metallurgy 50 Expired
US6277648A Process and a device for the isolation of cell components such as nucleic acids from natural sources Emerging Cross-Sectional Technologies 49 Expired
US6992182B1 Method for isolating DNA from biological materials Chemistry; Metallurgy 47 Expired
US7285331B1 Ultraphobic surface Emerging Cross-Sectional Technologies 41 Expired
US7270953B2 Compositions for isolating and/or stabilising nucleic acids in biological material Chemistry; Metallurgy 41 Expired
US6723510B2 Methods for separating particulate substrates from solution while minimizing particle loss Chemistry; Metallurgy 40 Expired
US7648824B2 Method of sequencing DNA Chemistry; Metallurgy 38 Active
US6300069A Generation and amplification of nucleic acids from ribonucleic acids Chemistry; Metallurgy 37 Expired
US8512650B2 Device for mounting pipette tips, pipette tip, and pipetting device Performing Operations; Transporting 36 Active
US7005266B2 Nucleic acid isolation from stool samples and other inhibitor-rich biological materials Chemistry; Metallurgy 33 Expired
US8252535B2 RNA interference tags Chemistry; Metallurgy 31 Active
US7683035B1 Method of stabilizing and/or isolating nucleic acids Emerging Cross-Sectional Technologies 28 Expired

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.