Gopal H. Singhal
22Patents
9h-index
28Co-inventors
71Inventor score
Filing activity: Jul 29, 1974 → Aug 4, 1992
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5278121A | Multimetallic sulfide catalyst containing noble metals for hydrodenitrogenation | Performing Operations; Transporting | 60 | Expired |
| US4434043A | Recovery of catalyst from coal liquefaction residues | Chemistry; Metallurgy | 33 | Expired |
| US4561964A | Catalyst for the hydroconversion of carbonaceous materials | Performing Operations; Transporting | 31 | Expired |
| US4454024A | Hydroconversion process | Chemistry; Metallurgy | 21 | Expired |
| US5064527A | Catalytic process for hydroconversion of carbonaceous materials | Chemistry; Metallurgy | 19 | Expired |
| US5034142A | Lubricating oil containing a nickel alkoxyalkylxanthate, a dixanthogen, and zinc dialkyldithiophosphate | Chemistry; Metallurgy | 18 | Expired |
| US5055211A | Lubricating oil containing a mixed ligand metal complex and a metal thiophosphate | Chemistry; Metallurgy | 15 | Expired |
| US4014785A | Novel liquid membrane formulations and uses thereof | Chemistry; Metallurgy | 11 | Expired |
| US3969265A | Novel liquid membrane formulations and use thereof | Performing Operations; Transporting | 9 | Expired |
| US4272400A | Regeneration of spent hydrodesulfurization catalysts employing presulfiding treatment and heteropoly acids | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4268415A | Regeneration of spent hydrodesulfurization catalysts with heteropoly acids and hydrogen peroxide | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5294349A | Coal depolymerization and hydroprocessing | Performing Operations; Transporting | 8 | Expired |
| US4272401A | Regeneration of spent hydrodesulfurization catalyst with heteropoly acids | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4853110A | Method for separating arsenic and/or selenium from shale oil | Chemistry; Metallurgy | 7 | Expired |
| US3959173A | Novel liquid membrane formulations and uses thereof | Performing Operations; Transporting | 6 | Expired |
| US4064040A | Sour water treating process utilizing liquid membranes having a sulfonated polymer exterior oil phase | Performing Operations; Transporting | 6 | Expired |
| US5086027A | Novel noble metal supported hydrotreating catalysts | Performing Operations; Transporting | 5 | Expired |
| US4824558A | Coal liquefaction process with metal/iodine cocatalyst | Chemistry; Metallurgy | 4 | Expired |
| US4683316A | Method of preparation of dithiocarbamate complexes of molybdenum (VI) | Chemistry; Metallurgy | 4 | Expired |
| US4681957A | Method of preparing hydrocarbon substituted dithiocarbamates of molybdenum | Chemistry; Metallurgy | 2 | Expired |
| US5035815A | Lubricating oil containing a nickel alkoxyalkylxanthate and zinc dialkyldithiophosphate | Chemistry; Metallurgy | 0 | Expired |
| US5026492A | Lubricating oil containing an alkyl alkoxyalkylxanthate and zinc dialkyldithiophosphate | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.