Union Oil Company of California
1,119Patents
2Active
1,119Granted
49Portfolio score
Filing activity: Sep 29, 1961 → Sep 7, 2011 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5126037A | Geopreater heating method and apparatus | Emerging Cross-Sectional Technologies | 305 | Expired |
| US4016239A | Recarbonation of spent oil shale | Emerging Cross-Sectional Technologies | 281 | Expired |
| US5181571A | Well casing flotation device and method | Fixed Constructions | 258 | Expired |
| US5355967A | Underbalance jet pump drilling method | Fixed Constructions | 188 | Expired |
| US4674572A | Corrosion and erosion-resistant wellhousing | Emerging Cross-Sectional Technologies | 146 | Expired |
| US5472049A | Hydraulic fracturing of shallow wells | Fixed Constructions | 143 | Expired |
| US5117915A | Well casing flotation device and method | Fixed Constructions | 138 | Expired |
| US5291956A | Coiled tubing drilling apparatus and method | Fixed Constructions | 120 | Expired |
| US5405171A | Dual gasket lined pipe connector | Emerging Cross-Sectional Technologies | 113 | Expired |
| US5246073A | High temperature stable gels | Emerging Cross-Sectional Technologies | 112 | Expired |
| US6176307A | Tubing-conveyed gravel packing tool and method | Fixed Constructions | 111 | Expired |
| US4521499A | Highly conductive photoelectrochemical electrodes and uses thereof | Emerging Cross-Sectional Technologies | 111 | Expired |
| US4986361A | Well casing flotation device and method | Fixed Constructions | 111 | Expired |
| US4506982A | Apparatus for continuously blending viscous liquids with particulate solids | Performing Operations; Transporting | 110 | Expired |
| US4592807A | Methods of making highly conductive photoelectrochemical electrodes | Emerging Cross-Sectional Technologies | 105 | Expired |
| US6370547B1 | Database correlation method | Emerging Cross-Sectional Technologies | 90 | Expired |
| US4460707A | Hydroprocessing catalyst and method for preparing it | Chemistry; Metallurgy | 90 | Expired |
| US5069352A | Transportable cargo container | Performing Operations; Transporting | 88 | Expired |
| US4498543A | Method for placing a liner in a pressurized well | Fixed Constructions | 85 | Expired |
| US4787453A | Permeability stabilization in subterranean formations containing particulate matter | Emerging Cross-Sectional Technologies | 85 | Expired |
| US5161615A | Method for reducing water production from wells | Chemistry; Metallurgy | 85 | Expired |
| US3998272A | Method of acidizing wells | Chemistry; Metallurgy | 83 | Expired |
| US5275242A | Repositioned running method for well tubulars | Fixed Constructions | 83 | Expired |
| US4031958A | Plugging of water-producing zones in a subterranean formation | Chemistry; Metallurgy | 79 | Expired |
| US4476930A | Inhibition of scale deposition from steam generation fluids | Emerging Cross-Sectional Technologies | 76 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.