WANHUA CHEMICAL GROUP CO., LTD.
61Patents
61Active
61Granted
55Portfolio score
Filing activity: Dec 29, 2010 → Aug 26, 2020 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9138717B2 | High-speed mixing reactor and application thereof | Performing Operations; Transporting | 4 | Active |
| US9790314B2 | Viscoelastic sound-absorbing polyurethane foam and preparation method thereof | Chemistry; Metallurgy | 2 | Active |
| US9975985B2 | Polyisocyanate modified with sulphamic acid, preparation method thereof and use thereof | Chemistry; Metallurgy | 1 | Active |
| US9580380B2 | Method for preparing diamino-dicyclohexyl methane | Emerging Cross-Sectional Technologies | 1 | Active |
| US10814314B2 | Catalyst for aminating polyether polyol and preparation method thereof and method of preparing polyetheramines using catalyst thereof | Chemistry; Metallurgy | 1 | Active |
| US11291985B2 | Preparation method for propylene epoxidation catalyst, and application thereof | Emerging Cross-Sectional Technologies | 1 | Active |
| US10696574B2 | Method for treating reverse osmosis concentrated water | Chemistry; Metallurgy | 1 | Active |
| US11814339B2 | Method for preparing isocyanate in gaseous phase | Chemistry; Metallurgy | 0 | Active |
| US11045794B2 | Supported catalyst used for synthesizing polyether amine, and manufacturing method | Performing Operations; Transporting | 0 | Active |
| US11059772B2 | Imine-type quaternary ammonium salt catalyst, preparation method thereof and use thereof for preparation of polyisocyanate composition | Chemistry; Metallurgy | 0 | Active |
| US11118000B2 | Polyurethane or polyurethane-urea aqueous dispersion, preparation method therefor, and use thereof | Chemistry; Metallurgy | 0 | Active |
| US11746033B2 | Method for treating production wastewater from the preparation of propylene oxide by co-oxidation | Chemistry; Metallurgy | 0 | Active |
| US11597796B2 | Ionic aqueous epoxy curing agent, preparation method therefor and use thereof | Chemistry; Metallurgy | 0 | Active |
| US11167280B2 | Catalyst for preparing α-phenylethanol by hydrogenation of acetophenone, preparation method thereof and application thereof | Performing Operations; Transporting | 0 | Active |
| US12304993B2 | Storage-stable polyisocyanate composition and preparation method | Chemistry; Metallurgy | 0 | Active |
| US9926259B1 | Catalyst for fixed bed aniline rectification residue recycling and preparation method | Emerging Cross-Sectional Technologies | 0 | Active |
| US12251463B2 | Composition containing water-soluble non-ionic polyurethane dispersion, and preparation method therefor | Human Necessities | 0 | Active |
| US11613627B2 | Halogen-free flame retardant thermoplastic polyurethane elastomer composition and product and flame retardant package thereof | Chemistry; Metallurgy | 0 | Active |
| US9062154B2 | Polycarbonate preparation method | Chemistry; Metallurgy | 0 | Active |
| US8829245B2 | 3-aminomethyl-3, 5, 5-trimethyl cyclohexylamine preparation method | Chemistry; Metallurgy | 0 | Active |
| US12202792B2 | Preparation method for optically active citronellal | Chemistry; Metallurgy | 0 | Active |
| US9701624B2 | Method for preparing biuret polyisocyanate | Chemistry; Metallurgy | 0 | Active |
| US11939280B2 | Method for preparing isophorone diisocyanate | Chemistry; Metallurgy | 0 | Active |
| US10974233B2 | Catalyst for preparing 1,5-pentanediol via hydrogenolysis of tetrahydrofurfuryl alcohol, method and application thereof | Performing Operations; Transporting | 0 | Active |
| US8759591B2 | Method for intermittently producing 4,4′-diaminodicyclohexylmethane with a low amount of the trans-trans isomer | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.