James A. Frayer
18Patents
9h-index
10Co-inventors
58Inventor score
Filing activity: Apr 28, 1975 → Oct 20, 1977
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4133777A | Hydrodesulfurization catalyst | Performing Operations; Transporting | 28 | Expired |
| US4118310A | Hydrodesulfurization process employing a guard reactor | Chemistry; Metallurgy | 18 | Expired |
| US4111796A | Method for presulfiding hydrodesulfurization catalysts | Performing Operations; Transporting | 15 | Expired |
| US4080286A | Hydrodesulfurization process employing a Group IV-B promoted catalyst | Chemistry; Metallurgy | 14 | Expired |
| US3968026A | Hydrodesulfurization process with parallel first stages in series with a unified second stage | Chemistry; Metallurgy | 12 | Expired |
| US4173528A | Multistage residual oil hydrodesulfurization process employing segmented feed addition and product removal | Chemistry; Metallurgy | 10 | Expired |
| US3968027A | Multi-stage hydrodesulfurization utilizing a second stage catalyst promoted with a group IV-B metal | Chemistry; Metallurgy | 10 | Expired |
| US4071439A | Hydrodesulfurization shutdown method | Chemistry; Metallurgy | 10 | Expired |
| US4116819A | Hydrodesulfurization process including product recycle | Chemistry; Metallurgy | 9 | Expired |
| US4116817A | Hydrodesulfurization process employing a promoted catalyst | Chemistry; Metallurgy | 9 | Expired |
| US4179355A | Combination residual oil hydrodesulfurization and thermal cracking process | Chemistry; Metallurgy | 8 | Expired |
| US3968028A | Process for onstream regeneration of a hydrodesulfurization catalyst | Chemistry; Metallurgy | 7 | Expired |
| US4170546A | Multistage residual oil hydrodesulfurization process | Chemistry; Metallurgy | 4 | Expired |
| US3968031A | Multi-stage hydrodesulfurization process utilizing multi-cycle second stage promoted catalyst | Chemistry; Metallurgy | 3 | Expired |
| US4179354A | Combination residual oil hydrodesulfurization and catalytic cracking process | Chemistry; Metallurgy | 2 | Expired |
| US4170545A | Multistage residual oil hydrodesulfurization process with an interstage flashing step | Chemistry; Metallurgy | 1 | 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.