Darrell W. Walker
26Patents
13h-index
17Co-inventors
78Inventor score
Filing activity: Apr 30, 1975 → Jul 10, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5132472A | Catalytic oxidation of alkanes | Performing Operations; Transporting | 89 | Expired |
| US5414157A | Catalytic oxidation of alkanes | Emerging Cross-Sectional Technologies | 70 | Expired |
| US4404124A | Selective hydrogenation catalyst | Emerging Cross-Sectional Technologies | 63 | Expired |
| US5439859A | Process and catalyst for dehydrogenation of organic compounds | Emerging Cross-Sectional Technologies | 56 | Expired |
| US5220080A | Chromia on metal oxide catalysts for the oxidation of methane to methanol | Emerging Cross-Sectional Technologies | 54 | Expired |
| US4484015A | Selective hydrogenation | Emerging Cross-Sectional Technologies | 50 | Expired |
| US4144277A | Dehydrogenation of hydrocarbons with zinc titanate catalyst | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4176140A | Dehydrogenation of hydrocarbons with zinc titanate catalyst | Chemistry; Metallurgy | 38 | Expired |
| US5733518A | Process and catalyst for dehydrogenation of organic compounds | Performing Operations; Transporting | 27 | Expired |
| US4873211A | Cracking catalyst and process | Performing Operations; Transporting | 25 | Expired |
| US4794095A | Catalytic cracking catalyst | Performing Operations; Transporting | 23 | Expired |
| US4846960A | Catalytic cracking | Performing Operations; Transporting | 15 | Expired |
| US4765884A | Cracking catalyst and process | Performing Operations; Transporting | 15 | Expired |
| US4918249A | Silicometallate molecular sieves and their use as catalysts in oxidation of alkanes | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4252680A | Oxidative dehydrogenation catalyst preparation | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5345011A | New manganese catalyst for light alkane oxidation | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5386074A | Catalytic dehydrogenation of alkanes | Chemistry; Metallurgy | 10 | Expired |
| US4263133A | Catalytic reforming and hydrocracking of organic compounds employing zinc titanate as the catalytic agent | Chemistry; Metallurgy | 10 | Expired |
| US4010114A | Oxidative dehydrogenation catalyst | Chemistry; Metallurgy | 9 | Expired |
| US4218346A | Zinc titanate catalyst for dehydrogenation of hydrocarbons | Chemistry; Metallurgy | 9 | Expired |
| US4228040A | Lithium- or magnesium-promoted zinc titanate catalyst for dehydrogenation of hydrocarbons | Chemistry; Metallurgy | 6 | Expired |
| US5345010A | Chromia on metal oxide for the oxidation of alkane to alcohol | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4370310A | Zinc aluminate prepared using an alumina hydrate | Chemistry; Metallurgy | 6 | Expired |
| US4727053A | Passivation of metal contaminated cracking catalysts | Performing Operations; Transporting | 2 | Expired |
| US4793914A | Passivation of metal contaminated cracking catalysts | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.