Issued Patents All Time
Showing 26–50 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4559131 | Reactivation of steam-deactivated catalysts | — | 1985-12-17 |
| 4550092 | Activity enhancement of high silica zeolites | Clarence D. Chang | 1985-10-29 |
| 4544783 | Conversion of oxygenates to hydrocarbons | Clarence D. Chang | 1985-10-01 |
| 4540841 | Catalysis over activated zeolites | Clarence D. Chang | 1985-09-10 |
| 4540840 | Catalysis over activated high silica zeolites | Clarence D. Chang | 1985-09-10 |
| 4538015 | Catalysis over activated zeolites | Clarence D. Chang | 1985-08-27 |
| 4538014 | Catalysis over activated zeolites | Clarence D. Chang | 1985-08-27 |
| 4538016 | Catalysis over activated zeolites | Clarence D. Chang | 1985-08-27 |
| 4530756 | Catalysis over activated high silica zeolites | Clarence D. Chang | 1985-07-23 |
| 4524140 | Hydrothermal zeolite activation | Clarence D. Chang | 1985-06-18 |
| 4515892 | Fermentation process | Nai Y. Chen | 1985-05-07 |
| 4515682 | Catalysis over activated high silica zeolites | Clarence D. Chang | 1985-05-07 |
| 4513091 | Hydrothermal zeolite activation | Clarence D. Chang | 1985-04-23 |
| 4512876 | Catalysis over activated high silica zeolites | Clarence D. Chang | 1985-04-23 |
| 4500420 | Catalysis over activated zeolites | Clarence D. Chang | 1985-02-19 |
| 4500419 | Catalysis over activated zeolites | Clarence D. Chang | 1985-02-19 |
| 4500418 | Catalysis over activated inorganic oxides | Clarence D. Chang | 1985-02-19 |
| 4500422 | Catalysis over activated zeolites | Clarence D. Chang | 1985-02-19 |
| 4500421 | Catalysis over activated zeolites | Clarence D. Chang | 1985-02-19 |
| 4477582 | Reactivation of steam-deactivated catalysts | — | 1984-10-16 |
| 4444900 | Activation of zeolites | Clarence D. Chang | 1984-04-24 |
| 4444902 | Activation of high silica zeolites | Clarence D. Chang | 1984-04-24 |
| 4435516 | Activity enhancement of high silica zeolites | Clarence D. Chang | 1984-03-06 |
| 4427789 | Activation of zeolites | Clarence D. Chang | 1984-01-24 |
| 4427786 | Activation of high silica zeolites | Clarence D. Chang | 1984-01-24 |