Studiengesellschaft Kohle gGmbH
201Patents
39Active
201Granted
45Portfolio score
Filing activity: Jul 1, 1958 → Jan 19, 2023 · 8 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4153063A | Process for the extraction of nicotine from tobacco | Human Necessities | 112 | Expired |
| US3969196A | Process for the separation of mixtures of substances | Emerging Cross-Sectional Technologies | 101 | Expired |
| US4321259A | Controlled improvement of the O.sub.2 -release by intact erythrocytes | Human Necessities | 60 | Expired |
| US6596238B1 | Coatings with cross-linked hydrophilic polymers | Physics | 54 | Expired |
| US4331695A | Production of fats and oils from vegetable and animal products | Chemistry; Metallurgy | 51 | Expired |
| US4063009A | Polymerization of ethylenically unsaturated hydrocarbons | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4192869A | Controlled improvement of the O.sub.2 release by intact erythrocytes with lipid vesicles | Human Necessities | 40 | Expired |
| US4652449A | Encapsulating biological active substances into erythrocytes | Performing Operations; Transporting | 38 | Expired |
| US4473563A | Lipid vesicles containing inositol hexaphosphate | Human Necessities | 33 | Expired |
| US5250184A | Procedure for the preparation of microporous ceramic membranes for the separation of gas and liquid mixtures | Emerging Cross-Sectional Technologies | 32 | Expired |
| US6224739A | Process for preparing solvent-stabilized metal colloids and substrate-immobilized metal clusters | Performing Operations; Transporting | 32 | Expired |
| US4123559A | Process for the production of spice extracts | Human Necessities | 30 | Expired |
| US4752586A | Apparatus for encapsulating biological active substances into erythrocytes | Performing Operations; Transporting | 28 | Expired |
| US4724273A | Process for preparing alpha-olefin polymers and oligomers | Chemistry; Metallurgy | 28 | Expired |
| US4104409A | Production of hop extracts | Chemistry; Metallurgy | 28 | Expired |
| US6255418A | Catalysts containing organochromium compounds and their use for polymerizing alkenes | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5936100A | Synthesis of functionalized macrocycles by ring closing metathesis | Chemistry; Metallurgy | 25 | Expired |
| US5641723A | Process for the preparation of highly active doped metal supported catalysts | Performing Operations; Transporting | 24 | Expired |
| US4006149A | Catalytic production of pyridines from alkynes and nitriles | Performing Operations; Transporting | 22 | Expired |
| US6531304B1 | Method for modifying the dispersion characteristics of metal organic-prestabilized or pre-treated nanometal colloids | Emerging Cross-Sectional Technologies | 22 | Expired |
| US6090746A | Process for producing tenside-stabilized colloids of mono- and bimetals of the group VIII and Ib of the periodic system in the form of precursors for catalysts which are isolable and water soluble at high concentration | Chemistry; Metallurgy | 22 | Expired |
| US6121187A | Amorphous, microporous mixed oxide catalysts with controlled surface polarity for selective heterogeneous catalysis, adsorption and material separation | Performing Operations; Transporting | 18 | Expired |
| US6309798A | Lithographical process for production of nanostructures on surfaces | Electricity | 18 | Expired |
| US6507636B1 | Rapid X-ray diffraction screening method of polymorph libraries created in multi-well plates | Performing Operations; Transporting | 17 | Expired |
| US5620584A | Electrochemical reduction of metal salts as a method of preparing highly dispersed metal colloids and substrate fixed metal clusters by electrochemical reduction of metal salts | Emerging Cross-Sectional Technologies | 17 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.