Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
CC

Clarence D. Chang — 188 Patents

ExxonMobil: 187 patents #4 of 10,161Top 1%
Princeton, NJ: #4 of 2,186 inventorsTop 1%
New Jersey: #59 of 69,400 inventorsTop 1%
Overall (All Time): #3,879 of 4,157,543Top 1%
188 Patents All Time
Clarence D. Chang has been granted 188 US patents while listed as an inventor at ExxonMobil. The first was granted in 1980 and the most recent in May 2004. Clarence D. Chang ranks #3,879 of 4,157,543 US inventors in our database (top 0.09%). Patent records list Clarence D. Chang in Princeton, NJ, US.

Issued Patents All Time

Showing 1–25 of 188 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6730625 Hydroalkylation of aromatic hydrocarbons Jane C. Cheng, Terry E. Helton, Michael A. Steckel, Scott A. Stevenson 2004-05-04 $153,296,000
6541408 Zeolite catalysts having stabilized hydrogenation-dehydrogenation function Paul G. Rodewald 2003-04-01 $127,110,000
6538162 Method for converting alkanes to oxygenates Jose G. Santiesteban 2003-03-25 $317,961,000
6365767 Process for co-production of dialkyl carbonate and alkanediol Zhaozhong Jiang, Rene B. LaPierre, Suzanne E. Schramm, Hye Kyung Cho Timken 2002-04-02 $1,602,297,000
6346498 Zeolite catalysts having stabilized hydrogenation-dehydrogenation function Paul G. Rodewald 2002-02-12 $505,984,000
6342623 Process for co-production of dialkyl carbonate and alkanediol Larry E. Hoglen, Zhaozhong Jiang, Rene B. LaPierre 2002-01-29 $259,089,000
6312657 Production of nitrous oxide Scott A. Stevenson, James C. Vartuli 2001-11-06 $315,013,000
6290755 Method for separating methane from natural gas using bisglycoluril derivatives Suzanne E. Schramm, Clarence Chase 2001-09-18 $510,121,000
6258962 Process for producing alkylene carbonates J. Scott Buchanan, Robert A. Crane, Lorenzo C. DeCaul, Zhaozhong Jiang, Jose G. Santiesteban +1 more 2001-07-10
6224748 Process for hydrocracking cycle oil Scott Han, Daniel J. Martenak, Jose G. Santiesteban, Dennis E. Walsh 2001-05-01
6217747 Process for selective wax hydrocracking Scott Han, Daniel J. Martenak, Jose G. Santiesteban, Dennis E. Walsh 2001-04-17
6166240 Process for co-production of dialkyl carbonate and alkanediol Larry E. Hoglen, Zhaozhong Jiang, Rene B. LaPierre 2000-12-26
6162940 Process for co-production of dialkyl carbonate and alkanediol Larry E. Hoglen, Zhaozhong Jiang, Rene B. LaPierre 2000-12-19
6162757 Acid catalyst composition Scott Han, Scott A. Stevenson, James C. Vartuli 2000-12-19
6124232 Method for preparing an acidic solid oxide Charles T. Kresge, Jose G. Santiesteban, James C. Vartuli 2000-09-26
6114551 Olefin epoxidation catalysts Doron Levin, Shifang Luo, Jose G. Santiesteban, James C. Vartuli 2000-09-05
6106594 Method for separating methane from natural gas using bisglycoluril derivatives Suzanne E. Schramm, Clarence Chase 2000-08-22
6080904 Isomerization process Jose G. Santiesteban, David L. Stern 2000-06-27
6037513 Hydroalkylation of aromatic hydrocarbons Jane C. Cheng, Terry E. Helton, Michael A. Steckel, Scott A. Stevenson 2000-03-14
6008399 Process for preparing organic carbonates Jose G. Santiesteban 1999-12-28
5993643 Process for naphtha hydrocracking Scott Han, Roger A. Morrison, Jose G. Santiesteban 1999-11-30 $186,057,000
5990365 Catalyst comprising ZSM-5, rhenium and a selectivating agent Frank T. DiGuiseppi, Scott Han 1999-11-23 $198,198,000
5902767 Catalyst having an acidic solid oxide component and a group IB metal or metal oxide component Charles T. Kresge, Jose G. Santiesteban, David S. Shihabi, Scott A. Stevenson, James C. Vartuli 1999-05-11 $285,324,000
5854170 Method for preparing a modified solid oxide Frank T. DiGuiseppi, Scott Han, Jose G. Santiesteban, David L. Stern 1998-12-29 $238,623,000
5804690 Selective monomethylation of aromatics with dimethylcarbonate Tracy J. Huang 1998-09-08 $343,078,000