David C. Kramer
28Patents
13h-index
35Co-inventors
81Inventor score
Filing activity: Jan 20, 1984 → Jul 19, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6086749A | Catalyst and method for hydroprocessing a hydrocarbon feed stream in a reactor containing two or more catalysts | Performing Operations; Transporting | 72 | Expired |
| US4615796A | Method for contacting solids-containing feeds in a layered bed reactor | Performing Operations; Transporting | 53 | Expired |
| US5298152A | Process to prevent catalyst deactivation in activated slurry hydroprocessing | Chemistry; Metallurgy | 44 | Expired |
| US5472928A | Catalyst, method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed | Performing Operations; Transporting | 40 | Expired |
| US5076908A | Method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed | Performing Operations; Transporting | 38 | Expired |
| US5866743A | Hydrodealkylation processes | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5849969A | Hydrodealkylation processes | Emerging Cross-Sectional Technologies | 24 | Expired |
| US7282134B2 | Process for manufacturing lubricating base oil with high monocycloparaffins and low multicycloparaffins | Emerging Cross-Sectional Technologies | 24 | Expired |
| US7083713B2 | Composition of lubricating base oil with high monocycloparaffins and low multicycloparaffins | Emerging Cross-Sectional Technologies | 23 | Expired |
| US7195706B2 | Finished lubricating comprising lubricating base oil with high monocycloparaffins and low multicycloparaffins | Emerging Cross-Sectional Technologies | 18 | Expired |
| US7141157B2 | Blending of low viscosity Fischer-Tropsch base oils and Fischer-Tropsch derived bottoms or bright stock | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5733440A | Catalyst, method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed | Performing Operations; Transporting | 15 | Expired |
| US4988433A | Demetalation of hydrocarbonaceous feedstocks using monobasic carboxylic acids and salts thereof | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5294329A | Process to prevent catalyst deactivation in activated slurry hydroprocessing | Chemistry; Metallurgy | 12 | Expired |
| US7144497B2 | Blending of low viscosity Fischer-Tropsch base oils with conventional base oils to produce high quality lubricating base oils | Chemistry; Metallurgy | 12 | Expired |
| US5599440A | Catalyst method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed | Performing Operations; Transporting | 11 | Expired |
| US5302357A | Apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed | Performing Operations; Transporting | 10 | Expired |
| US5498327A | Catalyst, method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed | Performing Operations; Transporting | 9 | Expired |
| US6187725A | Process for making an automatic transmission fluid composition | Chemistry; Metallurgy | 8 | Expired |
| US5409598A | Method of hydroprocessing | Performing Operations; Transporting | 7 | Expired |
| US6110879A | Automatic transmission fluid composition | Chemistry; Metallurgy | 5 | Expired |
| US6905593B2 | Method for removing calcium from crude oil | Chemistry; Metallurgy | 5 | Expired |
| US5593573A | Demetalation of hydrocarbonaceous feedstocks using sulfuric acid and salts thereof | Chemistry; Metallurgy | 4 | Expired |
| USRE38532E1 | Hydrodealkylation processes | General | 2 | Expired |
| US8480879B2 | Process for improving lubricating qualities of lower quality base oil | Chemistry; Metallurgy | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.