Issued Patents All Time
Showing 101–125 of 249 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5262015 | Separation of octene-1 from its isomers by azeotropic and extractive distillation | Randi W. Wytcherley | 1993-11-16 |
| 5258102 | Separation of heptane from vinyl acetate by azeotropic distillation | — | 1993-11-02 |
| 5256259 | Separation of hexane from vinyl acetate by azeotropic distillation | Randi W. Wytcherley | 1993-10-26 |
| 5250157 | Separation of toluene from methyl isobutyl ketone by azeotropic distillation | Randi W. Wytcherley | 1993-10-05 |
| 5246470 | Removal of sulfur from coal and pitch with dolomite | John Berg, John C. Orth | 1993-09-21 |
| 5240567 | Separation of vinyl acetate from methyl acrylate by extractive distillation | Randi W. Wytcherley | 1993-08-31 |
| 5236559 | Separation of hexane from vinyl acetate and methyl acrylate by extractive distillation | Randi W. Wytcherley | 1993-08-17 |
| 5232558 | Separation of 4-methyl-2-pentanone from formic acid by extractive distillation with DMSO | Marc W. Paffhausen | 1993-08-03 |
| 5228956 | Separation of 3-pentanone from formic acid by extractive distillation | Rudolph J. Szabados | 1993-07-20 |
| 5228957 | Separation of methyl T-butyl ether from close boiling C.sub.5 hydrocarbons by extractive distillation | — | 1993-07-20 |
| 5227029 | Separation of formic acid from acetic acid by extractive distillation | Randi W. Wytcherley | 1993-07-13 |
| 5225050 | Separation of N-hexane from vinyl acetate by extractive distillation | Randi W. Wytcherley | 1993-07-06 |
| 5207876 | Separation of tetrachloroethylene from the lower alcohols by extractive distillation | Zuyin Yang | 1993-05-04 |
| 5198077 | Recovery of glycerine from mannitol, lactose or lactitol by azeotropic distillation | — | 1993-03-30 |
| 5196094 | Separation of 1,1,1-trichloroethane from the lower alcohols by extractive distillation | Zuyin Yang | 1993-03-23 |
| 5194123 | Separation of 4-methyl-2-pentanone from acetic acid by extractive distillation with DMSO | Marc W. Paffhausen | 1993-03-16 |
| 5190619 | Separation of 3-methyl-2-butanone from formic acid by extractive distillation with DMSO | George Bentu | 1993-03-02 |
| 5190622 | Recovery of glycerine from sorbitol by azeotropic distillation | — | 1993-03-02 |
| 5173156 | Dehydration of formic acid by extractive distillation | Kraig M. Wendt, Rudolph J. Szabados | 1992-12-22 |
| 5167774 | Dehydration of acetic acid by extractive distillation | — | 1992-12-01 |
| 5160585 | Separation of tetrachloroethylene from a butyl alcohol by extractive distillation | — | 1992-11-03 |
| 5160412 | Dehydration of acetic acid by azeotropic distillation | — | 1992-11-03 |
| 5154800 | Dehydration of acrylic acid by extractive distillation | — | 1992-10-13 |
| 5152876 | Separation of methylene chloride from the lower alcohols by extractive distillation | Zuyin Yang | 1992-10-06 |
| 5151160 | Dehydration of 2-methoxyethanol by extractive distillation | — | 1992-09-29 |