Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840646 | Tetrabromo bisphenol based polyestercarbonate membranes and method of using | Stephen E. Bales, Darrell C. Feay, Thomas O. Jeanes | 1989-06-20 |
| 4818254 | Semi-permeable membranes consisting predominantly of polycarbonates derived from tetrahalobisphenols | Darrell C. Feay, Stephen E. Bales, Thomas O. Jeanes | 1989-04-04 |