Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4988371 | Novel alicyclic polyimide gas separation membranes | Thomas O. Jeanes, John D. Summers | 1991-01-29 |
| 4975228 | Process for preparing membranes from tetrahalobisphenol polycarbonates | Hawk S. Wan, Henry N. Beck | 1990-12-04 |
| 4962131 | Composition useful in process for preparing powadir membranes from tetrahalobisphenol a polycarbonates | Henry N. Beck, G. Glenn Lipscomb, II | 1990-10-09 |
| 4955993 | Semi-permeable hollow fiber gas separation membranes possessing a non-external discriminating region | John A. Jensvold, Daniel O. Clark, Frederick L. Coan, Henry N. Beck, William E. Mickols +2 more | 1990-09-11 |
| 4838904 | Semi-permeable membranes with an internal discriminating region | Daniel O. Clark, John A. Jensvold | 1989-06-13 |
| 4772392 | Process for preparing POWADIR membranes from tetrahalobisphenol A polycarbonates | Daniel O. Clark, John A. Jensvold, Henry N. Beck, G. Glenn Lipscomb, II, Frederick L. Coan | 1988-09-20 |