Issued Patents All Time
Showing 26–50 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6346499 | Catalyst composition for producing diaryl carbonates using carboxylic acid amide as promoter | Bruce Fletcher Johnson, Grigorii Lev Soloveichik, Kirill Vladimirovich Shalyaev | 2002-02-12 |
| 6310232 | Method for recycle of bromide-containing catalyst constituents | John Yaw Ofori, Ben Purushotam Patel, Phillip Oscar Moreno, Richard Anthony Battista | 2001-10-30 |
| 6303835 | Method for recovering material values from bisphenol tars | Sheldon J. Shafer, Julia Lam Lee | 2001-10-16 |
| 6265340 | Catalyst composition and method for producing diaryl carbonates | Bruce Fletcher Johnson, Kirill Vladimirovich Shalyaev, Grigorii Lev Soloveichik | 2001-07-24 |
| 6222002 | Method for preparing polycarbonates by oxidative carbonylation | Raghunath Vitthal Chaudhari, Ashutosh Anant Kelkar, Sunil Purushottam Gupte, Bhalchandra Mahadeo Bhanage, Mohammed Shadbar Qureshi +4 more | 2001-04-24 |
| 6215014 | Catalyst composition and method for producing diaryl carbonates | Bruce Fletcher Johnson, Kirill Vladimirovich Shalyaev, Grigorii Lev Soloveichik | 2001-04-10 |
| 6207848 | Process for the production of diaryl carbonates | — | 2001-03-27 |
| 6197991 | Method and catalyst system for producing | James Spivack, Donald Wayne Whisenhunt, Jr., James Norman Cawse, Bruce Fletcher Johnson, Grigorii Lev Soloveichik +1 more | 2001-03-06 |
| 6197916 | Method for preparing bisphenol A | Joseph Richard Wetzel | 2001-03-06 |
| 6191299 | Method for making aromatic carbonates | Bruce Fletcher Johnson, Phillip Oscar Moreno, Richard Anthony Battista | 2001-02-20 |
| 6180812 | Catalyst composition and method for producing diaryl carbonates using amide as promoter | Bruce Fletcher Johnson, Grigorii Lev Soloveichik, Kirill Vladimirovich Shalyaev | 2001-01-30 |
| 6172254 | Catalyst composition and method for producing diaryl carbonates using nitrile as promoter | Grigorii Lev Soloveichik, Bruce Fletcher Johnson, Kirill Vladimirovich Shalyaev | 2001-01-09 |
| 6160154 | Method and catalyst system for producing aromatic carbonates | James Spivack, Donald Wayne Whisenhunt, Jr., James Norman Cawse, Bruce Fletcher Johnson, Marsha Mottel Grade +2 more | 2000-12-12 |
| 6143914 | Method and catalyst system for producing aromatic carbonates | James Spivack, Donald Wayne Whisenhunt, Jr., James Norman Cawse, Bruce Fletcher Johnson, Grigorii Lev Soloveichik +1 more | 2000-11-07 |
| 6114564 | Catalyst composition and method for producing diaryl carbonates | Grigorii Lev Soloveichik, Kirill Vladimirovich Shalyaev, Bruce Fletcher Johnson | 2000-09-05 |
| 5990362 | Method for preparing bisphenol A | Joseph Richard Wetzel | 1999-11-23 |
| 5981788 | Method for recovering and recycling catalyst constituents | John Yaw Ofori, Sheldon J. Shafer, Ganesh Kailasam, Julia Lam Lee | 1999-11-09 |
| 5908952 | Method for preparing diaryl carbonates employing .beta.-diketone salts | Sheldon J. Shafer | 1999-06-01 |
| 5898079 | Method for preparing diaryl carbonates employing hexaalkylguanidinium halides | Sheldon J. Shafer | 1999-04-27 |
| 5898080 | Method for preparing diaryl carbonates employing hexaalkylguanidinium halides | Sheldon J. Shafer | 1999-04-27 |
| 5763686 | Method for preparing 1,1,1-tris(4-hydroxyphenyl)ethane | Patrick Joseph McCloskey | 1998-06-09 |
| 5760272 | Method for preparing diaryl carbonates with improved selectivity | Sheldon J. Shafer | 1998-06-02 |
| 5756801 | Method of purifying diphenyl carbonate-phenol adduct | Sheldon J. Shafer | 1998-05-26 |
| 5723691 | Method for preparing ion-exchange resin for use as a catalyst in the synthesis of bisphenols | Michael J. Cipullo | 1998-03-03 |
| 5723689 | Process for recovering bisphenols | Sheldon J. Shafer, Joseph Richard Wetzel, Martin Herke Oyevaar | 1998-03-03 |