Patrick M. Brown
26Patents
12h-index
28Co-inventors
81Inventor score
Filing activity: Mar 4, 1976 → Jul 18, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4036713A | Process for the production of high purity lithium hydroxide | Chemistry; Metallurgy | 75 | Expired |
| US4207297A | Process for producing high purity lithium carbonate | Emerging Cross-Sectional Technologies | 50 | Expired |
| US5219550A | Production of low boron lithium carbonate from lithium-containing brine | Chemistry; Metallurgy | 49 | Expired |
| US5246684A | Method of extracting zinc from brines | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4980136A | Production of lithium metal grade lithium chloride from lithium-containing brine | Chemistry; Metallurgy | 30 | Expired |
| US5358700A | Method of extracting zinc from brines | Emerging Cross-Sectional Technologies | 30 | Expired |
| US7282187B1 | Recovery of metal values | Emerging Cross-Sectional Technologies | 25 | Expired |
| US7465415B2 | Photochromic materials derived from ring-opening monomers and photochromic initiators | Chemistry; Metallurgy | 25 | Expired |
| US4271131A | Production of highly pure lithium chloride from impure brines | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5244491A | Method of extracting zinc lead and silver from brines | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4274834A | Process for purification of lithium chloride | Chemistry; Metallurgy | 17 | Expired |
| US6015535A | Process for producing purified cesium compound from cesium alum | Chemistry; Metallurgy | 12 | Expired |
| US4771246A | Method for determining the location of a leak in a pond liner formed of electrically insulating material | Physics | 10 | Expired |
| US4243392A | Process for solar concentration of lithium chloride brine | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4126666A | Process for producing high purity lithium sulfide | Chemistry; Metallurgy | 8 | Expired |
| US4341566A | Eutectic mixture as a flux for glass melts | Chemistry; Metallurgy | 8 | Expired |
| US6436879B1 | Process for producing a predetermined cesium compound | Chemistry; Metallurgy | 7 | Expired |
| US6338832B1 | Process for producing niobium and tantalum compounds | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US8748634B2 | Photochromic materials demonstrating improved fade rates | Chemistry; Metallurgy | 3 | Active |
| US7276225B2 | Process for producing niobium and tantalum compounds | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US6979429B2 | Method for solubilizing metal values | Emerging Cross-Sectional Technologies | 1 | Expired |
| US10689301B2 | Method of making a porous fuel cell component | Emerging Cross-Sectional Technologies | 0 | Active |
| US11444298B2 | Electrolyte shunt migration management in a fuel cell stack | Emerging Cross-Sectional Technologies | 0 | Active |
| US10633494B2 | Polymeric materials | Chemistry; Metallurgy | 0 | Active |
| US6984370B2 | Process for producing niobium and tantalum compounds | Mechanical Engineering; Lighting; Heating | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.