DL

David W. Leyshon

LT Lyondell Chemical Technology: 19 patents #4 of 123Top 4%
AT Arco Chemical Technology: 13 patents #26 of 285Top 10%
AR Atlantic Richfield: 5 patents #106 of 1,061Top 10%
EL Equistar Chemicals, Lp: 2 patents #94 of 250Top 40%
PP Phillips Petroleum: 1 patents #819 of 1,401Top 60%
📍 Houston, TX: #358 of 21,073 inventorsTop 2%
🗺 Texas: #2,702 of 125,132 inventorsTop 3%
Overall (All Time): #85,793 of 4,157,543Top 3%
38
Patents All Time

Issued Patents All Time

Showing 1–25 of 38 patents

Patent #TitleCo-InventorsDate
11590477 Titanated catalysts, methods of preparing titanated catalysts, and methods of epoxidation Sandor Nagy, Nicholas Bruschi, Elizabeth I. Ross-Medgaarden, Barbara F. Kimmich 2023-02-28
11440858 Method of improving olefin isomerization Rick B. Watson 2022-09-13
11261142 Isobutylene to propylene process flow improvement Rick B. Watson 2022-03-01
10513502 Alkylene oxide separation system Elizabeth I. Ross-Medgaarden, Karl P. Rufener, Sunti Kongkitisupchai, Richard J. Wolff, Kimberly A. Petry 2019-12-24
10513472 Methods of producing propylene and ethylene 2019-12-24
10233166 Alkylene oxide separation systems, methods, and apparatuses Xiangmin Li, Te Chang, Walter S. Dubner, Elizabeth I. Ross-Medgaarden 2019-03-19
9932318 Catalyst performance in propylene epoxidation Vu A. Dang, Sandor Nagy, Roger A. Grey 2018-04-03
9873648 Oxidative methods of phosphorus removal from liquid hydrocarbons Lei Zhang, Robert Bruce Maskell, Daniel F. White 2018-01-23
9643943 Process for forming propylene oxide from oxidation of methyl benzyl alcohol Vu A. Dang, Sandor Nagy, Roger A. Grey 2017-05-09
9593090 Alkylene oxide separation systems, methods, and apparatuses Xiangmin Li, Te Chang, Walter S. Dubner, Elizabeth I. Ross-Medgaarden 2017-03-14
9586881 Production of propylene glycol monoalkyl ether Xiangmin Li, Lawrence M. Candela, Mark A. Liepa 2017-03-07
8981133 Alkylene oxide separation systems, methods, and apparatuses Xiangmin Li, Te Chang 2015-03-17
8178737 Propylene production 2012-05-15
8067655 Diisobutylene process Natalie C. M. B. Nichols, Christopher P. Renaudo 2011-11-29
7816572 Propylene and isoprene production Thomas S. Zak 2010-10-19
7527725 Upgrading drip oil Krishnan Viswanathan, Lau S. Yang, Ellen S. Lenz 2009-05-05
7270742 Organosulfur oxidation process Lawrence J. Karas, Yuan-Zhang Han 2007-09-18
7238260 Purification of N-(2-hydroxyethyl)-2-pyrrolidone Andrew P. Kahn, Shaw-Chan Lin, Edward Patrick Carey 2007-07-03
7144499 Desulfurization process Yuan-Zhang Han 2006-12-05
6755979 Peroxide impurities removal Carl Williams, Shaw-Chan Lin, Lawrence M. Candela 2004-06-29
6583300 Epoxidation system with fixed bed reactors John C. Jubin, Jr., Richard J. Wolff 2003-06-24
6562987 Method for highly exothermic epoxidation reactions 2003-05-13
6512129 Epoxidation process Xiangmin Li 2003-01-28
5993673 Purification process Thomas I. Evans 1999-11-30
RE35633 Methane conversion process 1997-10-14