William A. Smith
26Patents
9h-index
22Co-inventors
75Inventor score
Filing activity: Sep 15, 1978 → May 3, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8993473B2 | Modified trilobe shape for maleic anhydride catalyst | Emerging Cross-Sectional Technologies | 24 | Active |
| US4202674A | Electrostatic gas cleaner | Performing Operations; Transporting | 20 | Expired |
| US5340446A | Purification of propylene oxide by cosolvent extractive distillation | Performing Operations; Transporting | 15 | Expired |
| US4971661A | Purification of propylene oxide using an aqueous acetone extractive distillatin agent | Chemistry; Metallurgy | 14 | Expired |
| US4691034A | Purification of propylene oxide by treatment with calcium hydroxide in glycerol or sugar water | Chemistry; Metallurgy | 11 | Expired |
| US4626596A | Synthesis of molybdenum/alkylene glycol complexes useful as epoxidation catalysts | Performing Operations; Transporting | 11 | Expired |
| US4891437A | Olefin epoxidation of olefins in a polar medium | Chemistry; Metallurgy | 10 | Expired |
| US4691035A | Purification of propylene oxide by treatment with a selected base and inert salt | Chemistry; Metallurgy | 10 | Expired |
| US5262017A | Plural stage purification of propylene oxide | Chemistry; Metallurgy | 9 | Expired |
| US4810809A | Ditertiary butyl peroxide recovery | Chemistry; Metallurgy | 8 | Expired |
| US4650886A | Synthesis of ammonium molybdate/alkanol complexes | Performing Operations; Transporting | 7 | Expired |
| US5414145A | Production of tertiary butyl alcohol from isobutane | Chemistry; Metallurgy | 7 | Expired |
| US5106458A | Method for the purification of propylene oxide | Chemistry; Metallurgy | 7 | Expired |
| US4654427A | Synthesis of molybdenum oxide/alkanol complexes | Performing Operations; Transporting | 7 | Expired |
| US5464505A | Use of propylene oxide adducts in the purification of propylene oxide by extractive distillation | Performing Operations; Transporting | 5 | Expired |
| US5620568A | Extractive distillation of propylene oxide using propanol | Chemistry; Metallurgy | 4 | Expired |
| US5157163A | Purification of methyl tertiary-butyl ether | Chemistry; Metallurgy | 3 | Expired |
| US6133484A | Methods for decomposing esters and purifying alcohols | Chemistry; Metallurgy | 3 | Expired |
| US5107067A | Catalytic reaction of propyelne with tertiary butyl hydroperoxide | Performing Operations; Transporting | 3 | Expired |
| US5128492A | Precipitation of molybdenum | Emerging Cross-Sectional Technologies | 2 | Expired |
| US5191143A | Preparation of isobutylene | Chemistry; Metallurgy | 2 | Expired |
| US5436376A | Production of tertiary butyl alcohol | Chemistry; Metallurgy | 2 | Expired |
| US5939592A | Methods for decomposing esters and purifying alcohols | Chemistry; Metallurgy | 2 | Expired |
| US5127997A | Purification of propylene oxide by liquid extraction | Chemistry; Metallurgy | 2 | Expired |
| US5232559A | Separation of molybdenum | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.