John A. Paraskos
26Patents
11h-index
22Co-inventors
75Inventor score
Filing activity: Apr 28, 1975 → Jan 6, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5260240A | Process for the demetallization of FCC catalyst | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4133777A | Hydrodesulfurization catalyst | Performing Operations; Transporting | 28 | Expired |
| US4017382A | Hydrodesulfurization process with upstaged reactor zones | Chemistry; Metallurgy | 27 | Expired |
| US4118310A | Hydrodesulfurization process employing a guard reactor | Chemistry; Metallurgy | 18 | Expired |
| US4110192A | Process for liquefying coal employing a vented dissolver | Chemistry; Metallurgy | 17 | Expired |
| US6508930B1 | Method for stabilizing operation of fluid catalytic converter units | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4016070A | Multiple stage hydrodesulfurization process with extended downstream catalyst life | Chemistry; Metallurgy | 16 | Expired |
| US4217202A | Process for selective recovery of relatively metals-free bitumen from tar sand using a halogenated aliphatic solvent in combination with a second solvent | Chemistry; Metallurgy | 13 | Expired |
| US3968026A | Hydrodesulfurization process with parallel first stages in series with a unified second stage | Chemistry; Metallurgy | 12 | Expired |
| US4083769A | Catalytic process for liquefying coal | Chemistry; Metallurgy | 12 | Expired |
| US4081361A | Process for the conversion of carbonaceous materials | Chemistry; Metallurgy | 11 | Expired |
| US3968027A | Multi-stage hydrodesulfurization utilizing a second stage catalyst promoted with a group IV-B metal | Chemistry; Metallurgy | 10 | Expired |
| US4016069A | Multiple stage hydrodesulfurization process including partial feed oil by-pass of first stage | Chemistry; Metallurgy | 9 | Expired |
| US4116817A | Hydrodesulfurization process employing a promoted catalyst | Chemistry; Metallurgy | 9 | Expired |
| US4116819A | Hydrodesulfurization process including product recycle | Chemistry; Metallurgy | 9 | Expired |
| US4128471A | Coal liquefaction process employing carbon monoxide | Emerging Cross-Sectional Technologies | 8 | Expired |
| US3968028A | Process for onstream regeneration of a hydrodesulfurization catalyst | Chemistry; Metallurgy | 7 | Expired |
| US4133740A | Process for increasing the fuel yield of coal liquefaction products by extraction of asphaltenes, resins and aromatic compounds from said coal liquefaction products | Chemistry; Metallurgy | 5 | Expired |
| US4045182A | Hydrodesulfurization apparatus with upstaged reactor zones | Chemistry; Metallurgy | 5 | Expired |
| US4148716A | Process for separating tar and solids from coal liquefaction products using a halogenated aliphatic solvent | Chemistry; Metallurgy | 4 | Expired |
| US4157291A | Process for extending life of coal liquefaction catalyst | Emerging Cross-Sectional Technologies | 4 | Expired |
| US3968031A | Multi-stage hydrodesulfurization process utilizing multi-cycle second stage promoted catalyst | Chemistry; Metallurgy | 3 | Expired |
| US4053391A | Hydrodesulfurization process employing a guard chamber | Chemistry; Metallurgy | 2 | Expired |
| US3968029A | Desulfurization process employing multi-catalyst reactor | Chemistry; Metallurgy | 1 | Expired |
| US4116818A | Multi-reactor hydrodesulfurization process | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.