Roger A. Baldwin
22Patents
10h-index
21Co-inventors
75Inventor score
Filing activity: Oct 23, 1975 → Jan 16, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4405464A | Process for the removal of selenium from aqueous systems | Emerging Cross-Sectional Technologies | 48 | Expired |
| US4519913A | Process for the removal and recovery of selenium from aqueous solutions | Emerging Cross-Sectional Technologies | 35 | Expired |
| US4028219A | Process for the production of deashed coal liquifaction products | Chemistry; Metallurgy | 30 | Expired |
| US4519912A | Process for the removal of sulfate and metals from aqueous solutions | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4119523A | Processes for the production of deashed coal | Chemistry; Metallurgy | 27 | Expired |
| US4389302A | Process for vis-breaking asphaltenes | Chemistry; Metallurgy | 18 | Expired |
| US4070268A | Solvent recovery in a coal deashing process | Chemistry; Metallurgy | 16 | Expired |
| US4164466A | Method of improving yield in a coal liquefaction product deashing process | Chemistry; Metallurgy | 15 | Expired |
| US4189372A | Process for the hydroconversion of coal | Chemistry; Metallurgy | 13 | Expired |
| US4595558A | Additive agents for use in the manufacture of molded particulate metal articles | Performing Operations; Transporting | 11 | Expired |
| US5730796A | Durable pigmentary titanium dioxide and methods of producing the same | Chemistry; Metallurgy | 9 | Expired |
| US4702899A | Process for treating coal to reduce sulfur content in flue gases produced by coal combustion | Performing Operations; Transporting | 8 | Expired |
| US4719110A | Boron-containing wood preservatives | Performing Operations; Transporting | 7 | Expired |
| US4406663A | Process for concentration of slurries comprising insoluble coal products | Chemistry; Metallurgy | 7 | Expired |
| US5160084A | Method for adhesively bonding a rail-tie fastening assembly to a wooden railway tie | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4119524A | Coal deashing process having improved solvent recovery techniques | Chemistry; Metallurgy | 6 | Expired |
| US4162958A | Process for the discharge of ash concentrate from a coal deashing system | Chemistry; Metallurgy | 6 | Expired |
| US4762552A | Improved process for beneficating iron-containing titaniferous ores | Chemistry; Metallurgy | 5 | Expired |
| US4244812A | System for producing a powdery composition comprising coal products in a coal deashing process | Chemistry; Metallurgy | 5 | Expired |
| US4177134A | Separation technique in a coal deashing process | Chemistry; Metallurgy | 4 | Expired |
| US5108726A | Compacts of spray dried water soluble compounds | Chemistry; Metallurgy | 3 | Expired |
| US4605421A | Process for the preparation of a carbonaceous-derived solid fuel product | Chemistry; Metallurgy | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.