HRI
46Patents
0Active
46Granted
38Portfolio score
Filing activity: May 12, 1980 → May 9, 1997
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4452911A | Frangible catalyst pretreatment method for use in hydrocarbon hydrodemetallization process | Emerging Cross-Sectional Technologies | 99 | Expired |
| US4599303A | Nucleic acid hybridization assay employing probes crosslinkable to target sequences | Chemistry; Metallurgy | 75 | Expired |
| US4853111A | Two-stage co-processing of coal/oil feedstocks | Chemistry; Metallurgy | 69 | Expired |
| US5421326A | Heat resistant suit with active cooling system | Human Necessities | 55 | Expired |
| US4407367A | Method for in situ recovery of heavy crude oils and tars by hydrocarbon vapor injection | Fixed Constructions | 52 | Expired |
| US5037791A | Porous metal oxide supported carbon-coated catalysts and method for producing same | Chemistry; Metallurgy | 45 | Expired |
| US4839030A | Coal liquefaction process utilizing coal/CO.sub.2 slurry feedstream | Emerging Cross-Sectional Technologies | 42 | Expired |
| US4478705A | Hydroconversion process for hydrocarbon liquids using supercritical vapor extraction of liquid fractions | Chemistry; Metallurgy | 33 | Expired |
| US4483631A | Multiple thermocouple system for high temperature reactors | Physics | 32 | Expired |
| US5033413A | Fluidized bed combustion system and method utilizing capped dual-sided contact units | Mechanical Engineering; Lighting; Heating | 29 | Expired |
| US4576710A | Catalyst desulfurization of petroleum residua feedstocks | Chemistry; Metallurgy | 25 | Expired |
| US4454240A | Catalyst regeneration process including metal contaminants removal | Performing Operations; Transporting | 24 | Expired |
| US4702891A | Fluid flow distribution system for fluidized bed reactor | Performing Operations; Transporting | 24 | Expired |
| US4398852A | Process and apparatus for adding and removing particles from pressurized reactors | Performing Operations; Transporting | 22 | Expired |
| US4592826A | Use of ethers in thermal cracking | Chemistry; Metallurgy | 19 | Expired |
| US4842719A | Catalytic two-stage coal hydrogenation and hydroconversion process | Chemistry; Metallurgy | 19 | Expired |
| US4441943A | Polypeptides as chemical tagging materials | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4400263A | H-Coal process and plant design | Chemistry; Metallurgy | 18 | Expired |
| US4457831A | Two-stage catalytic hydroconversion of hydrocarbon feedstocks using resid recycle | Chemistry; Metallurgy | 17 | Expired |
| US4595666A | Catalyst rejuvenation process for removal of metal contaminants | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4521295A | Sustained high hydroconversion of petroleum residua feedstocks | Chemistry; Metallurgy | 14 | Expired |
| US4879021A | Hydrogenation of coal and subsequent liquefaction of hydrogenated undissolved coal | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US4947803A | Fludized bed reactor using capped dual-sided contact units and methods for use | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US4816141A | Catalytic two-stage liquefaction of coal utilizing cascading of used ebullated-bed catalyst | Chemistry; Metallurgy | 13 | Expired |
| US4621069A | Continuous process for catalyst regeneration by staged burnoff of carbon and sulfur compounds | Emerging Cross-Sectional Technologies | 11 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.