Issued Patents All Time
Showing 1–25 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876228 | Zeolite modifications | Clarence D. Chang, Cynthia T-W. Chu, Pochen Chu, Ralph M. Dessau, William E. Garwood +2 more | 1989-10-24 |
| 4780194 | Organic compound conversion with ammonium hydroxide and alkali metal aluminate treated zeolite | Clarence D. Chang | 1988-10-25 |
| 4711970 | Catalytic conversion | Clarence D. Chang | 1987-12-08 |
| 4690903 | Process for preparing organic fuels and chemicals from biomass | Nai Y. Chen | 1987-09-01 |
| 4678763 | Method for reclaiming heat-damaged catalysts | Clarence D. Chang | 1987-07-07 |
| 4670412 | Modification of crystalline microporous zeolites | Clarence D. Chang, Cynthia T-W. Chu | 1987-06-02 |
| 4665255 | Catalytic conversion of aromatic compounds | Clarence D. Chang | 1987-05-12 |
| 4665248 | Zeolite modification and its use in conversion of alcohols and ethers to hydrocarbons | Clarence D. Chang | 1987-05-12 |
| 4645864 | Catalytic conversion | Clarence D. Chang | 1987-02-24 |
| 4638105 | Acid-catalyzed xylene isomerization | Clarence D. Chang | 1987-01-20 |
| 4624774 | Catalytic cracking of using catalyst produced by novel process hydrocarbons | Clarence D. Chang | 1986-11-25 |
| 4620921 | Acid-catalyzed hydrocarbon conversion process | Clarence D. Chang | 1986-11-04 |
| 4620054 | Acid-catalyzed xylene isomerization | Clarence D. Chang | 1986-10-28 |
| 4607130 | Acid-catalyzed organic compound conversion | Clarence D. Chang | 1986-08-19 |
| 4605805 | Acid-catalyzed organic compound conversion | Clarence D. Chang | 1986-08-12 |
| 4605804 | Acid-catalyzed organic compound conversion | Clarence D. Chang | 1986-08-12 |
| 4605803 | Acid-catalyzed organic compound conversion | Clarence D. Chang | 1986-08-12 |
| 4605637 | Hydrothermal activation of acid zeolites with aluminum phosphates | Clarence D. Chang | 1986-08-12 |
| 4596704 | Activation of zeolites | Clarence D. Chang | 1986-06-24 |
| 4590050 | Synthesis of crystalline aluminum phosphates with a urea templating agent | Clarence D. Chang | 1986-05-20 |
| 4579987 | Catalysis over activated high silica zeolites | Clarence D. Chang | 1986-04-01 |
| 4577048 | Catalysis over activated high silica zeolites | Clarence D. Chang | 1986-03-18 |
| 4576805 | Increasing lattice metal content of porous inorganic crystalline compositions | Clarence D. Chang | 1986-03-18 |
| 4564719 | Catalysts over AlF.sub.3 activated high silica zeolites | Clarence D. Chang | 1986-01-14 |
| 4559131 | Reactivation of steam-deactivated catalysts | — | 1985-12-17 |