John A. Wismer
22Patents
7h-index
16Co-inventors
66Inventor score
Filing activity: May 2, 1988 → Dec 14, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6013846A | Azeotrope of HF and 1233zd | Chemistry; Metallurgy | 53 | Expired |
| US4950364A | Process for the separation of 1,1-dichloro-1-fluoroethane and 1,1,1,3,3-pentafluorobutane | Chemistry; Metallurgy | 19 | Expired |
| US4975156A | Process for the separation of hydrogen fluoride, 1,1-dichloro-1-fluoroethane and 1-chloro-1,1-difluoroethane from liquid mixtures thereof | Emerging Cross-Sectional Technologies | 18 | Expired |
| US9255045B2 | E-1-chloro-3,3,3-trifluoropropene production process from 1,1,3,3-tetrachloropropene | Chemistry; Metallurgy | 15 | Active |
| US10532965B2 | E-1-chloro-3,3,3-trifluoropropene production process from 1,1,3,3-tetrachloropropene | Chemistry; Metallurgy | 13 | Active |
| US9834499B2 | E-1-chloro-3,3,3-trifluoropropene production process from 1,1,3,3-tetrachloropropene | Chemistry; Metallurgy | 13 | Active |
| US5208398A | HF extraction of R365 from R141B | Chemistry; Metallurgy | 8 | Expired |
| US6479718B1 | Liquid phase process for HCFC-123 | Chemistry; Metallurgy | 6 | Expired |
| US8642819B2 | Process for the manufacture of hydrochlorofluoroolefins | Chemistry; Metallurgy | 4 | Active |
| US5242672A | Process for removing sulfur from organic polysulfides | Emerging Cross-Sectional Technologies | 3 | Expired |
| US9725384B2 | Method for separating organofluorine compounds using membrane | Emerging Cross-Sectional Technologies | 3 | Active |
| US5639924A | Process for the production of 1,1,1-trifluoroethane | Performing Operations; Transporting | 2 | Expired |
| US8735636B2 | Separation of R-1233 from hydrogen fluoride | Chemistry; Metallurgy | 1 | Active |
| US9061958B2 | Separation of R-1233 from hydrogen fluoride | Performing Operations; Transporting | 1 | Active |
| US8895788B2 | Process for the manufacture of hydrofluoroolefins | Chemistry; Metallurgy | 1 | Active |
| US8987534B2 | Process for the manufacture of hydrochlorofluoroolefins | Chemistry; Metallurgy | 1 | Active |
| US5600038A | Adiabatic Hydrofluorination of hydrochlorofluorocarbons | Performing Operations; Transporting | 1 | Expired |
| US6605193B2 | Recovery of HFC-32 | Chemistry; Metallurgy | 1 | Expired |
| US5608124A | Process for continuous liquid phase reaction of hydrogen fluoride and 1,1,1-trichloroethane to provide 1,1-dichloro-1-fluoroethane and 1-chloro-1, 1-difluoroethane mixtures | Chemistry; Metallurgy | 0 | Expired |
| US9284241B2 | Process for the removal of contaminant from a hydrochlorofluoroolefin by extractive distillation | Chemistry; Metallurgy | 0 | Active |
| US8642818B2 | Process for the manufacture of hydrofluoroolefins | Chemistry; Metallurgy | 0 | Active |
| US11220472B2 | Processes and systems for recovering R1233ZD in purified form | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.