Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874401 | Gas separation membranes from bisphenol AF polycarbonates and polyestercarbonates | — | 1989-10-17 |
| 4851014 | Gas separation membranes derived from polycarbonates, polyesters, and polyestercarbonates containing tetrafluorobisphenol F | — | 1989-07-25 |
| 4840646 | Tetrabromo bisphenol based polyestercarbonate membranes and method of using | Joginder N. Anand, Stephen E. Bales, Darrell C. Feay | 1989-06-20 |
| 4818254 | Semi-permeable membranes consisting predominantly of polycarbonates derived from tetrahalobisphenols | Joginder N. Anand, Darrell C. Feay, Stephen E. Bales | 1989-04-04 |