Atlantic Richfield Company
1,864Patents
3Active
1,864Granted
47Portfolio score
Filing activity: Jan 22, 1969 → Jul 17, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3948319A | Method and apparatus for producing fluid by varying current flow through subterranean source formation | Fixed Constructions | 354 | Expired |
| US4489782A | Viscous oil production using electrical current heating and lateral drain holes | Fixed Constructions | 316 | Expired |
| US5271472A | Drilling with casing and retrievable drill bit | Fixed Constructions | 314 | Expired |
| US4483341A | Therapeutic hypothermia instrument | Emerging Cross-Sectional Technologies | 300 | Expired |
| US4651825A | Enhanced well production | Fixed Constructions | 297 | Expired |
| US5197553A | Drilling with casing and retrievable drill bit | Fixed Constructions | 289 | Expired |
| US5472057A | Drilling with casing and retrievable bit-motor assembly | Fixed Constructions | 250 | Expired |
| US4662437A | Electrically stimulated well production system with flexible tubing conductor | Fixed Constructions | 249 | Expired |
| US4640353A | Electrode well and method of completion | Fixed Constructions | 247 | Expired |
| US5435400A | Lateral well drilling | Fixed Constructions | 235 | Expired |
| US4399866A | Method for controlling the flow of subterranean water into a selected zone in a permeable subterranean carbonaceous deposit | Fixed Constructions | 230 | Expired |
| US3986557A | Production of bitumen from tar sands | Fixed Constructions | 226 | Expired |
| US4461922A | Solar cell module | Emerging Cross-Sectional Technologies | 213 | Expired |
| US4597444A | Method for excavating a large diameter shaft into the earth and at least partially through an oil-bearing formation | Fixed Constructions | 210 | Expired |
| US3988187A | Method of laying floor tile | Emerging Cross-Sectional Technologies | 199 | Expired |
| US4714117A | Drainhole well completion | Fixed Constructions | 187 | Expired |
| US4744245A | Acoustic measurements in rock formations for determining fracture orientation | Fixed Constructions | 183 | Expired |
| US5529123A | Method for controlling fluid loss from wells into high conductivity earth formations | Fixed Constructions | 182 | Expired |
| US4883125A | Cementing oil and gas wells using converted drilling fluid | Chemistry; Metallurgy | 181 | Expired |
| US4915745A | Thin film solar cell and method of making | Emerging Cross-Sectional Technologies | 173 | Expired |
| US5168942A | Resistivity measurement system for drilling with casing | Fixed Constructions | 172 | Expired |
| US5482117A | Gas-liquid separator for well pumps | Fixed Constructions | 171 | Expired |
| US4798660A | Method for forming Cu In Se.sub.2 films | Emerging Cross-Sectional Technologies | 167 | Expired |
| US4807704A | System and method for providing multiple wells from a single wellbore | Fixed Constructions | 154 | Expired |
| US5613557A | Apparatus and method for sealing perforated well casing | Fixed Constructions | 153 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.