Issued Patents All Time
Showing 51–72 of 72 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6590108 | Methods for the preparation of dianhydrides | Thomas Link Guggenheim, William J. Swatos, Michael J. Vollmer | 2003-07-08 |
| 6576770 | Preparation of substituted phthalic anhydrides and substituted phthalimides | Thomas Link Guggenheim, Philip L. Angermeier | 2003-06-10 |
| 6528663 | Methods for the preparation of 4-chlorophthalic anhydride | Thomas Link Guggenheim | 2003-03-04 |
| 6498224 | Methods for the preparation poly(etherimide)s | Thomas Link Guggenheim, William J. Swatos, Michael J. Vollmer | 2002-12-24 |
| 6251354 | Process for recovering sodium nitrite | Robert E. Greenwell, Thomas Link Guggenheim, Norman Johnson, Jimmy Lynn Webb | 2001-06-26 |
| 6235934 | Aqueous hexasubstituted guanidinium chlorides and methods for their preparation and use | Joseph John Caringi, Gary R. Faler, Peter D. Phelps, Thomas Link Guggenheim, Larry I. Flowers +1 more | 2001-05-22 |
| 6160082 | Process for branching thermoplastic linear polycarbonate resins | Ye-Gang Lin, William J. Swatos, Pin-pin Wu | 2000-12-12 |
| 6008374 | Process for preparing bis (ether anhydrides) using alkylamine derived bisimides having low melting temperatures | Brent A. Dellacoletta, Thomas Link Guggenheim, Ronald A. Greenberg, James Barren, Joseph A. King, Jr. +3 more | 1999-12-28 |
| 5936099 | Process for preparing BIS(ether anhydrides) using alkylamine derived bisimides having low melting temperature | Brent A. Dellacoletta, Thomas Link Guggenheim, Ronald A. Greenberg, James Barren, Joseph A. King, Jr. +3 more | 1999-08-10 |
| 5872294 | Aqueous hexasubstituted guanidinium chlorides and methods for their preparation and use | Joseph John Caringi, Gary R. Faler, Peter D. Phelps, Thomas Link Guggenheim, Larry I. Flowers +1 more | 1999-02-16 |
| 5804525 | Method for making polycarbonates | Eugene Pauling Boden, Larry I. Flowers, Peter D. Phelps, David L. Ramsey, Paul Dean Sybert | 1998-09-08 |
| 5719295 | Process for preparing bis(ether anhydrides) using alkylamine derived bisimides having low melting temperatures | Brent A. Dellacoletta, Thomas Link Guggenheim, Ronald A. Greenberg, James Barren, Joseph A. King, Jr. +3 more | 1998-02-17 |
| 5608027 | Complex stabilizer composition to improve the melt stability and color stability of polycarbonates | Richard Crosby, James L. DeRudder, Larry I. Flowers, Ye-Gang Lin | 1997-03-04 |
| 5536846 | Process for preparing bis(ether anhydrides) using alkylamine derived bisimides having low melting temperatures | Brent A. Dellacoletta, Thomas Link Guggenheim, Ronald A. Greenberg, James Barren, Joseph A. King, Jr. +3 more | 1996-07-16 |
| 5519105 | Method for making polycarbonates | Eugene Pauling Boden, Larry I. Flowers, Peter D. Phelps, David L. Ramsey, Paul Dean Sybert | 1996-05-21 |
| 5391692 | Method for making aromatic polycarbonates | Eugene Pauling Boden, Peter D. Phelps, David L. Ramsey, Paul Dean Sybert, Larry I. Flowers | 1995-02-21 |
| 5359084 | Method of preparing aromatic ether bisimides | Brent A. Dellacoletta | 1994-10-25 |
| 5206429 | Nitration reactions with acid anhydride promoters | — | 1993-04-27 |
| 5155234 | Nitration of phthalic acid and phthalic anhydride using nitric acid | — | 1992-10-13 |
| 4921970 | Nitration reactions with acid anhydride promoters | — | 1990-05-01 |
| 4902809 | Method for making N-substituted nitrophthalimides | Peter G. Groeneweg | 1990-02-20 |
| 4599429 | Destruction of DNPI in an all nitric acid nitration process | — | 1986-07-08 |