Ralph M. Dessau
93Patents
21h-index
44Co-inventors
88Inventor score
Filing activity: Feb 28, 1973 → Mar 23, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5350504A | Shape selective hydrogenation of aromatics over modified non-acidic platinum/ZSM-5 catalysts | Performing Operations; Transporting | 84 | Expired |
| US5675047A | Method of preparation of ex situ selectivated zeolite catalysts for aromatic alkylation applications | Chemistry; Metallurgy | 70 | Expired |
| US5292976A | Process for the selective conversion of naphtha to aromatics and olefins | Chemistry; Metallurgy | 60 | Expired |
| US4443554A | Activation of alkali metal zeolite catalysts by steaming | Performing Operations; Transporting | 53 | Expired |
| US5939597A | Fluid bed process for para-xylene production | Chemistry; Metallurgy | 51 | Expired |
| US6008388A | Epoxidation process | Chemistry; Metallurgy | 40 | Expired |
| US4309281A | Selective sorption by zeolites | Chemistry; Metallurgy | 40 | Expired |
| US4324940A | Shape selective acid catalyzed reactions of olefins over crystalline zeolites | Chemistry; Metallurgy | 36 | Expired |
| US4962250A | Process for the conversion of paraffins to olefins and/or aromatics and non-acidic zeolite catalyst therefor | Chemistry; Metallurgy | 35 | Expired |
| US6005123A | Epoxidation process | Chemistry; Metallurgy | 31 | Expired |
| US4884531A | Operation of an internal combustion engine with a pre-engine reformer | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4652360A | Base-exchanged zeolite compositions with shape-selective metal functions | Chemistry; Metallurgy | 27 | Expired |
| US4461845A | Reactivation of steam-deactivated catalysts | Performing Operations; Transporting | 27 | Expired |
| US5488194A | Selective production of para-dialkyl substituted benzenes and catalyst therefor | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4935566A | Dehydrocyclization and reforming process | Chemistry; Metallurgy | 24 | Expired |
| US4704495A | Catalytic conversions using shape selective metallic catalysts | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4510045A | Hydrocarbon dewaxing process using steam-activated alkali metal zeolite catalyst | Performing Operations; Transporting | 24 | Expired |
| US5574199A | Para-selective aromatization process with ex situ selectivated zeolite catalyst | Chemistry; Metallurgy | 23 | Expired |
| US4886926A | Catalytic dehydrogenation of hydrocarbons over tin-containing crystalline microporous materials | Chemistry; Metallurgy | 22 | Expired |
| US5013423A | Reforming and dehydrocyclization | Chemistry; Metallurgy | 22 | Expired |
| US5019664A | Process for the conversion of paraffins to olefins and/or aromatics and low acidity zeolite catalyst therefor | Chemistry; Metallurgy | 21 | Expired |
| US5254787A | Dehydrogenation and dehydrocyclization using a non-acidic NU-87 catalyst | Chemistry; Metallurgy | 21 | Expired |
| US4867864A | Dehydrogenation, dehydrocyclization and reforming catalyst | Chemistry; Metallurgy | 20 | Expired |
| US5284986A | Upgrading of normal pentane to cyclopentene | Chemistry; Metallurgy | 19 | Expired |
| US5192728A | Tin-colating microporous crystalline materials and their use as dehydrogenation, dehydrocyclization reforming catalysts | Chemistry; Metallurgy | 19 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.