Issued Patents All Time
Showing 25 most recent of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12370517 | Catalyst loading method and method for preparation of butadiene by using same | Ye Seul Hwang, Daeheung Choi, Myungji Suh, Sunhwan Hwang, Dong Hyun Ko +1 more | 2025-07-29 |
| 11918988 | Method for producing catalyst for oxidative dehydrogenation reaction, catalyst for oxidative dehydrogenation reaction, and method for producing butadiene using same | Sunhwan Hwang, San Jin Han, Dong Hyun Ko, Kyoung Yong Cha | 2024-03-05 |
| 11731093 | Catalyst loading method and method for preparation of butadiene by using same | Ye Seul Hwang, Daeheung Choi, Myungji Suh, Sunhwan Hwang, Dong Hyun Ko +1 more | 2023-08-22 |
| 11660584 | Catalyst for oxidative dehydrogenation, method of preparing catalyst, and method of performing oxidative dehydrogenation using catalyst | Myung Ji Suh, Dong Hyun Ko, Kyong Yong Cha, Dae Heung Choi, Ye Seul Hwang +1 more | 2023-05-30 |
| 11519264 | Method for obtaining gravity coefficients for orthogonally oriented accelerometer devices during measurement-while-drilling operations | Sheng Zhan | 2022-12-06 |
| 11465138 | Method for producing metal complex catalyst, and metal complex catalyst produced by same | Sunhwan Hwang, Kyong Yong Cha, Dong Hyun Ko, Ye Seul Hwang, Sang Jin Han +1 more | 2022-10-11 |
| 11370730 | Method for preparing 1,3-butadiene | Hyunseok Nam, Jun Han Kang, Kyong Yong Cha, Jaewon Jeong, Dong Hyun Ko +8 more | 2022-06-28 |
| 11372128 | Method and system for detecting downhole magnetic interference on measurement while drilling operations | Sheng Zhan, Fengtao Hu, Jinhai Zhao | 2022-06-28 |
| 11247195 | Method of preparing catalyst for oxidative dehydrogenation and method of performing oxidative dehydrogenation using catalyst | Sang Jin Han, Dong Hyun Ko, Kyong Yong Cha, Sun-Hwan Hwang | 2022-02-15 |
| 11225864 | Method for controlling MWD tool in bottom hole assembly | Sheng Zhan, Fengtao Hu, Jinhai Zhao | 2022-01-18 |
| 11225863 | Method for controlling a drilling system | Sheng Zhan, Fengtao Hu, Jinhai Zhao | 2022-01-18 |
| 11187076 | Central storage unit for a measuring-while-drilling assembly for an oil drilling system | Sheng Zhan, Fengtao Hu, Jinhai Zhao | 2021-11-30 |
| 11180965 | Autonomous through-tubular downhole shuttle | Jinhai Zhao, Sheng Zhan | 2021-11-23 |
| 11117119 | Catalyst for oxidative dehydrogenation and method of preparing the same | Myung Ji Suh, Yoon Jae Min, Dong Hyun Ko, Kyong Yong Cha, Se Won Baek | 2021-09-14 |
| 11112777 | Independent high-speed sampling for an oil drilling system | Sheng Zhan, Fengtao Hu, Jinhai Zhao | 2021-09-07 |
| 11047680 | Multi-node data synchronous acquisition system and method for real-time monitoring of underwater surface deformation | Jiawang Chen, Huangchao Zhu, Chunying Xu, Chen Cao, Zhou Yu +1 more | 2021-06-29 |
| 11040335 | Method for manufacturing zinc ferrite catalyst and zinc ferrite catalyst manufactured thereby | Dong Hyun Ko, Kyong Yong Cha, Sang Jin Han, Sunhwan Hwang, Seongmin Kim | 2021-06-22 |
| 10994262 | Catalyst for oxidative dehydrogenation and method of preparing the same | Seongmin Kim, Dong Hyun Ko, Kyong Yong Cha, Dae Heung Choi, Myung Ji Suh +6 more | 2021-05-04 |
| 10926246 | Method of preparing catalyst for oxidative dehydrogenation | Dong Hyun Ko, Kyong Yong Cha, Myung Ji Suh, Sun-Hwan Hwang, Seong-Min Kim | 2021-02-23 |
| 10888844 | Catalyst for oxidative dehydrogenation, method of preparing catalyst, and method of performing oxidative dehydrogenation using catalyst | Myung Ji Suh, Dong Hyun Ko, Kyong Yong Cha, Dae Heung Choi, Ye Seul Hwang +1 more | 2021-01-12 |
| 10843173 | Ferrite catalyst for oxidative dehydrogenation, method of preparing ferrite catalyst, and method of preparing butadiene using ferrite catalyst | Sun-Hwan Hwang, Dong Hyun Ko, Jun Han Kang, Kyong Yong Cha, Joo Hyuck Lee +6 more | 2020-11-24 |
| 10738598 | System and method for transmitting signals downhole | Sheng Zhan, Fengtao Hu, Jinhai Zhao | 2020-08-11 |
| 10730809 | Butadiene preparation method providing excellent catalyst reproducibility | Myung Ji Suh, Dong Hyun Ko, Jun Han Kang, Kyong Yong Cha, Ye Seul Hwang +1 more | 2020-08-04 |
| 10591226 | Heat transfer device | Jae Hun Seol, Hyun-Woo Kim, Myung Ill You | 2020-03-17 |
| 10543478 | Catalyst for oxidative dehydrogenation and method of preparing the same | Kyong Yong Cha, Myung Ji Suh, Dong Hyun Ko, Dae Heung Choi, Ye Seul Hwang +2 more | 2020-01-28 |