Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10941353 | Methods and mixing systems for introducing catalyst precursor into heavy oil feedstock | — | 2021-03-09 |
| 10822553 | Mixing systems for introducing a catalyst precursor into a heavy oil feedstock | — | 2020-11-03 |
| 10118146 | Systems and methods for hydroprocessing heavy oil | Lap-Keung Lee | 2018-11-06 |
| 9920261 | Method for upgrading ebullated bed reactor and upgraded ebullated bed reactor | Lap-Keung Lee | 2018-03-20 |
| 9605215 | Systems for hydroprocessing heavy oil | Lap-Keung Lee | 2017-03-28 |
| 9453177 | Method and system for oxidatively increasing cetane number of hydrocarbon fuel | Kin Meng Chan, Kamalul Arifin Yusof, Shahrul Niza Bin Abdul Rahim, Md Asraff Bin Abdul Karim | 2016-09-27 |
| 8920633 | Method and system for oxidatively increasing cetane number of hydrocarbon fuel | Kin Meng Chan, Kamalul Arifin Yusof, Shahrul Niza Bin Abdul Rahim, Md Asraff Bin Abdul Karim | 2014-12-30 |
| 8673130 | Method for efficiently operating an ebbulated bed reactor and an efficient ebbulated bed reactor | Lap-Keung Lee | 2014-03-18 |
| 8557105 | Methods for increasing catalyst concentration in heavy oil and/or coal resid hydrocracker | Yu-Hwa Chang | 2013-10-15 |
| 8440071 | Methods and systems for hydrocracking a heavy oil feedstock using an in situ colloidal or molecular catalyst | Lap-Keung Lee | 2013-05-14 |
| 8431016 | Methods for hydrocracking a heavy oil feedstock using an in situ colloidal or molecular catalyst and recycling the colloidal or molecular catalyst | Lap-Keung Lee | 2013-04-30 |
| 8309041 | Systems for increasing catalyst concentration in heavy oil and/or coal resid hydrocracker | Yu-Hwa Chang | 2012-11-13 |
| 8303802 | Methods for hydrocracking a heavy oil feedstock using an in situ colloidal or molecular catalyst and recycling the colloidal or molecular catalyst | Lap-Keung Lee | 2012-11-06 |
| 8034232 | Methods for increasing catalyst concentration in heavy oil and/or coal resid hydrocracker | Yu-Hwa Chang | 2011-10-11 |
| 7815870 | Ebullated bed hydroprocessing systems | Lap-Keung Lee | 2010-10-19 |
| 7578928 | Hydroprocessing method and system for upgrading heavy oil using a colloidal or molecular catalyst | Lap-Keung Lee | 2009-08-25 |
| 7517446 | Fixed bed hydroprocessing methods and systems and methods for upgrading an existing fixed bed system | Lap-Keung Lee, Peter C. Quinn | 2009-04-14 |
| 7449103 | Ebullated bed hydroprocessing methods and systems and methods of upgrading an existing ebullated bed system | Lap-Keung Lee | 2008-11-11 |
| 7425584 | Catalytic devulcanization of rubber | Richard McFarlane, Haibo Huang | 2008-09-16 |
| 5578197 | Hydrocracking process involving colloidal catalyst formed in situ | Theodore Cyr, Leszek Lewkowicz, Baki OZUM, Lap-Keung Lee | 1996-11-26 |