Occidental Petroleum
104Patents
0Active
104Granted
43Portfolio score
Filing activity: Mar 2, 1973 → Feb 18, 2003
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4087130A | Process for the gasification of coal in situ | Emerging Cross-Sectional Technologies | 287 | Expired |
| US4005752A | Method of igniting in situ oil shale retort with fuel rich flue gas | Fixed Constructions | 286 | Expired |
| US3941421A | Apparatus for obtaining uniform gas flow through an in situ oil shale retort | Fixed Constructions | 172 | Expired |
| US4153514A | Pyrolysis process for solid wastes | Emerging Cross-Sectional Technologies | 170 | Expired |
| US4014575A | System for fuel and products of oil shale retort | Fixed Constructions | 130 | Expired |
| US4064018A | Internally circulating fast fluidized bed flash pyrolysis reactor | Chemistry; Metallurgy | 96 | Expired |
| US4322222A | Process for the gasification of carbonaceous materials | Emerging Cross-Sectional Technologies | 95 | Expired |
| US4102773A | Pyrolysis with cyclone burner | Chemistry; Metallurgy | 70 | Expired |
| US4085030A | Pyrolysis of carbonaceous materials with solvent quench recovery | Chemistry; Metallurgy | 69 | Expired |
| US4077847A | Solid waste disposal system | Emerging Cross-Sectional Technologies | 67 | Expired |
| US4145274A | Pyrolysis with staged recovery | Emerging Cross-Sectional Technologies | 62 | Expired |
| US4083751A | Continuous feed pyrolysis chamber for decomposing solid waste | Emerging Cross-Sectional Technologies | 62 | Expired |
| US4225415A | Recovering hydrocarbons from hydrocarbon-containing vapors | Chemistry; Metallurgy | 55 | Expired |
| US4147593A | Flash pyrolysis of organic solid waste employing ash recycle | Emerging Cross-Sectional Technologies | 48 | Expired |
| US4108732A | Heating carbonaceous particulate material | Performing Operations; Transporting | 46 | Expired |
| US4078973A | Loop pyrolysis process for organic solid wastes | Emerging Cross-Sectional Technologies | 42 | Expired |
| US4166786A | Pyrolysis and hydrogenation process | Chemistry; Metallurgy | 38 | Expired |
| US4357802A | Geothermal energy production | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4065282A | Method of recovery of glass from municipal waste | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4137156A | Separation of non-magnetic conductive metals | Performing Operations; Transporting | 31 | Expired |
| US3994343A | Process for in situ oil shale retorting with off gas recycling | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4146359A | Method for reacting nongaseous material with a gaseous reactant | Performing Operations; Transporting | 27 | Expired |
| US4162959A | Production of hydrogenated hydrocarbons | Chemistry; Metallurgy | 24 | Expired |
| US4334959A | Mixing method and apparatus | Chemistry; Metallurgy | 24 | Expired |
| US4027917A | Method for igniting the top surface of oil shale in an in situ retort | Fixed Constructions | 23 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.