Issued Patents All Time
Showing 51–65 of 65 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5194984 | Stilbazolium salt and optically non-linear devices incorporating same | Peter D. Phelps, Christopher P. Yakymyshyn, Kevin R. Stewart | 1993-03-16 |
| 5191038 | Preparation of branched polycarbonate composition from cyclic aromatic polycarbonate oligomer, polyhydric phenol and polycarbonate | Herman O. Krabbenhoft | 1993-03-02 |
| 5142088 | Preparation of branched polycarbonates and chloroformates, and intermediates therefor | Peter D. Phelps, Paul William Buckley | 1992-08-25 |
| 5136018 | Macrocyclic polyarylate compositions of decreased crystallinity | Peter D. Phelps | 1992-08-04 |
| 5100804 | Method for determining chloroformate concentration | Daniel J. Brunelle, David K. Bonauto | 1992-03-31 |
| 5097008 | Preparation of branched polycarbonate from oligomeric cyclic polycarbonate and polyhydric phenol | Herman O. Krabbenhoft | 1992-03-17 |
| 5094553 | Optical waveguides and method for their fabrication | Christopher P. Yakymyshyn, Peter D. Phelps, Kevin R. Stewart | 1992-03-10 |
| 5021521 | Process of reacting branched thermoplastic polycarbonate with polyhydric phenol having more than two hydroxy groups | Herman O. Krabbenhoft | 1991-06-04 |
| 5015720 | Method for preparing polycarbonates containing aliphatic ester groups | Peter D. Phelps | 1991-05-14 |
| 4983706 | Interfacial process comprising reacting a dihydric phenol, a carbonate precursor and an aliphatic alpha omega dicarboxylic salt | Luca P. Fontana, Paul William Buckley, Denise Y. Harris | 1991-01-08 |
| 4980453 | Macrocyclic oligomers containing spiro(bis)indane moietes | Daniel J. Brunelle, Thomas Link Guggenheim, James Anthony Cella, Thomas L. Evans, Luca P. Fontana +8 more | 1990-12-25 |
| 4888400 | Preparation of branched thermoplastic polycarbonate from polycarbonate and polyhydric phenol | Herman O. Krabbenhoft | 1989-12-19 |
| 4727134 | Method for preparing cyclic polycarbonate oligomer mixtures | Daniel J. Brunelle, Thomas Gerard Shannon | 1988-02-23 |
| 4722994 | Method of preparing cyclic oligomeric polycarbonates | — | 1988-02-02 |
| 4696998 | Cyclic heterocarbonates and methods for their preparation and use | Daniel J. Brunelle, Thomas Link Guggenheim, Thomas Gerard Shannon, Joseph Guiles | 1987-09-29 |