AKZO NOBEL N.V.
1,282Patents
173Active
1,282Granted
49Portfolio score
Filing activity: Jun 27, 1989 → Sep 24, 2014 · 146 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5381232A | Fabry-perot with device mirrors including a dielectric coating outside the resonant cavity | Physics | 233 | Expired |
| US5554517A | Nucleic acid amplification process | Chemistry; Metallurgy | 209 | Expired |
| US6063603A | Nucleic acid amplification process | Chemistry; Metallurgy | 134 | Expired |
| US6652738B2 | Process for preparing a mixed metal catalyst composition | Performing Operations; Transporting | 133 | Expired |
| US5646046A | Method and instrument for automatically performing analysis relating to thrombosis and hemostasis | Emerging Cross-Sectional Technologies | 118 | Expired |
| US5925359A | European vaccine strains of the porcine reproductive and respiratory syndrome virus | Emerging Cross-Sectional Technologies | 110 | Expired |
| US6534437B2 | Process for preparing a mixed metal catalyst composition | Performing Operations; Transporting | 109 | Expired |
| US5731101A | Low temperature ionic liquids | Chemistry; Metallurgy | 109 | Expired |
| US6239183A | Method for controlling the rheology of an aqueous fluid and gelling agent therefor | Emerging Cross-Sectional Technologies | 107 | Expired |
| US6506710B1 | Viscoelastic surfactants and compositions containing same | Emerging Cross-Sectional Technologies | 102 | Expired |
| US5979555A | Surfactants for hydraulic fractoring compositions | Emerging Cross-Sectional Technologies | 95 | Expired |
| US5338716A | Non-oxide metal ceramic catalysts comprising metal oxide support and intermediate ceramic passivating layer | Performing Operations; Transporting | 93 | Expired |
| US5674969A | Rigid rod polymer based on pyridobisimidazole | Textiles; Paper | 89 | Expired |
| US5665545A | Terminal repeat amplification method | Chemistry; Metallurgy | 88 | Expired |
| US7060661B2 | Acid thickeners and uses thereof | Emerging Cross-Sectional Technologies | 86 | Expired |
| US5834255A | Quantification of nucleic acid | Emerging Cross-Sectional Technologies | 80 | Expired |
| US6972274B1 | Method of improving the permeability of an underground petroleum-containing formation | Mechanical Engineering; Lighting; Heating | 79 | Expired |
| US6200532A | Devices and method for performing blood coagulation assays by piezoelectric sensing | Physics | 79 | Expired |
| US7700764B2 | Method of preparing microfibrillar polysaccharide | Emerging Cross-Sectional Technologies | 78 | Active |
| US6030915A | Process for preparing a large pore hydroprocessing catalyst | Chemistry; Metallurgy | 76 | Expired |
| US5989581A | Drug delivery system for two or more active substances | Human Necessities | 76 | Expired |
| US5378508A | Laser direct writing | Electricity | 75 | Expired |
| US6214232A | Membrane module with layered hollow-fiber membranes | Performing Operations; Transporting | 74 | Expired |
| US5466586A | Method for the synthesis of ribonucleic acid (RNA) | Chemistry; Metallurgy | 71 | Expired |
| US6566296B2 | Process for preparing an additive-based mixed metal catalyst, its composition and use | Performing Operations; Transporting | 70 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.