Inventor · disambiguated record
Johann Kieffer
Also filed as: KIEFFER JOHANN
19 granted patents·16 pending applications·43 citations·filing 2016–2025
90Inventor score
Top patents by PatentIndex Score
35 records- 0198US11535588B2Hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acidSPCM SA·Filed 2022·Granted Dec 27, 2022·4 cites·15 claims
- 0298US10759746B2Hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acidSPCM SA·Filed 2018·Granted Sep 1, 2020·34 cites·6 claims
- 0385US11802109B2Method for the purification of acrylamido-2-methyl-2-propanesulphonic acidSNF GROUP·Filed 2021·Granted Oct 31, 2023·1 cites·18 claims
- 0483US10836871B2Method of preparation of cationic polymers with reduced halides contentSPCM SA·Filed 2017·Granted Nov 17, 2020·2 cites·16 claims
- 0582US12269789B2Method for obtaining bio-sourced N-vinylformamideSNF GROUP·Filed 2022·Granted Apr 8, 2025·0 cites·3 claims
- 0682US11535587B2Hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acidSPCM SA·Filed 2022·Granted Dec 27, 2022·0 cites·15 claims
- 0780US10669231B2Method for producing 2-acrylamido-2-methylpropane sulphonic acidSPCM SA·Filed 2018·Granted Jun 2, 2020·1 cites·20 claims
- 0879US10662149B2Method for producing the 2-acrylamido-2-methylpropane sulfonic acid monomer and polymer comprising said monomerSPCM SA·Filed 2016·Granted May 26, 2020·1 cites·17 claims
- 0976US11365173B2Hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acidSPCM SA·Filed 2020·Granted Jun 21, 2022·0 cites·13 claims
- 1075US11767381B22-dimethylaminoethyl acrylate polymers and their preparation methodSNF GROUP·Filed 2022·Granted Sep 26, 2023·0 cites·20 claims
- 1175US10968171B2Fracturing fluid comprising a (co)polymer of a hydrated crystalline form of 2-acrylamido-2-methylpropane sulphonic acid and hydraulic fracturing methodSPCM SA·Filed 2018·Granted Apr 6, 2021·0 cites·20 claims
- 1272US11370749B2Method for treating a suspension of solid particles in water using a (co)polymer of a hydrated crystalline form of 2-acrylamido-2-methylpropanesulfonic acidSPCM SA·Filed 2018·Granted Jun 28, 2022·0 cites·20 claims
- 1372US11180446B2Enhanced oil recovery method using a (co)polymer of a hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acidSPCM SA·Filed 2018·Granted Nov 23, 2021·0 cites·20 claims
- 1470US2025243150A1Method for obtaining bio-sourced n-vinylformamideSNF GROUP·Filed 2025·Application pending·0 cites
- 1569US2025369075A1Process for separating rare-earth metals in admixture in aqueous solutionSNF SA·Filed 2025·Application pending·0 cites
- 1667US12030832B2Dialkyl tin oxide composition and process for producing 2-dimethylaminoethyl (meth)acrylateSNF GROUP·Filed 2021·Granted Jul 9, 2024·0 cites·5 claims
- 1767US2024034822A1Cationic polyacrylamides with micro-block structureSNF GROUP·Filed 2023·Application pending·0 cites
- 1864US12459889B2Sulfobetaine monomers, process for preparing same, and uses thereofSNF GROUP·Filed 2020·Granted Nov 4, 2025·0 cites·2 claims
- 1963US2025197896A1Head space / gas chromatography for reaction monitoring of acrylamide synthesisSNF GROUP·Filed 2024·Application pending·0 cites
- 2061US2024263201A1Biological method for obtaining monomers comprising an ethylenic unsaturation by bioconversion of a bio-sourced compound comprising at least one nitrile functionSPCM SA·Filed 2022·Application pending·0 cites
- 2161US2025369074A1Process for separating rare-earth metals in admixture in aqueous solutionSNF SA·Filed 2025·Application pending·0 cites
- 2260US11560510B2Aqueous fracturing fluid composition and fracturing process using the compositionSPCM SA·Filed 2021·Granted Jan 24, 2023·0 cites·20 claims
- 2360US2024279154A1Process for obtaining bio-sourced diallyldialkylammonium halideSNF GROUP·Filed 2022·Application pending·0 cites
- 2460US2024239933A1Method for obtaining a bio-sourced-monomer from renewable dimethylaminoethanolSNF GROUP·Filed 2022·Application pending·0 cites
- 2560US2024279397A1Bio-sourced cationic high charge density polymerSNF GROUP·Filed 2022·Application pending·0 cites
- 2660US2024132711A1High molecular weight anionic polyacrylamidesSNF GROUP·Filed 2023·Application pending·0 cites
- 2758US2023272129A1Polymer of 2-acrylamido-2-methylpropane sulfonic acid or the salts thereofSNF GROUP·Filed 2021·Application pending·0 cites
- 2857US2024132644A1Macromonomer, method for obtaining same and copolymer containing sameSNF GROUP·Filed 2021·Application pending·0 cites
- 2957US2024254384A1Method for obtaining bio-sourced (meth)allylsulfonate alkali saltSNF GROUP·Filed 2022·Application pending·0 cites
- 3053US2024034678A1Method for inerting clays in hydraulic compositions intended for the construction industrySNF GROUP·Filed 2021·Application pending·0 cites
- 3152US12145900B2Process for filtering 2-acrylamido-2-methylpropane sulfonic acidSPCM SA·Filed 2020·Granted Nov 19, 2024·0 cites·20 claims
- 3246US2024262786A1Method for obtaining bio-sourced susbtituted alkyl(meth)acrylamideSPCM SA·Filed 2022·Application pending·0 cites
- 3346US2025263507A1Polymer of 2-acrylamido-2-methylpropane sulphonic acid and use thereofSNF GROUP·Filed 2022·Application pending·0 cites
- 3445US12091480B2Method for producing 2-dimethylaminoethyl (meth)acrylateSNF GROUP·Filed 2018·Granted Sep 17, 2024·0 cites·18 claims
- 3545US10259767B2Method for the preparation of alkylsalicylaldehyde and alkylsalicylaldoxime, and use thereofSPCM SA·Filed 2016·Granted Apr 16, 2019·0 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →