STONE & WEBSTER PROCESS TECHNOLOGY, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C07C ACYCLIC OR CARBOCYCLIC COMPOUNDS 37101
 
  
 
B01J CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS 1693
 
  
 
C10G CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION 1349
 
  
 
B01D SEPARATION 9125
 
  
 
F27B FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS618
 
  
 
F28D HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT 441
 
  
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 352
 
  
 
F25J LIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT 326
 
  
 
B01F MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING 141
 
  
 
B04C APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES 112

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9630188 Device and method for decoke effluent processingNov 01, 13Apr 25, 17[B04C, C10G, B01D]
8496786 Heavy feed mixerDec 15, 09Jul 30, 13[C10G]
8383051 Separating and stripping apparatus for external FCC risersJul 22, 09Feb 26, 13[B01J, C10G]
8349753 Bathtub-type spent catalyst distributor for effective counter-current regeneration in fluid catalytic cracking unitsMar 23, 11Jan 08, 13[B01J]
8309776 Method for contaminants removal in the olefin production processDec 15, 09Nov 13, 12[C07C]
8258360 Multiphase alkylaromatics productionMar 01, 06Sep 04, 12[C07C]
7951739 Bathtub-type spent catalyst distributor for effective counter-current regeneration in fluid catalytic cracking unitsFeb 18, 10May 31, 11[B01J]
7939704 Process for preparing ethylbenzene using vapor phase alkylation and liquid phase transalkylationApr 01, 10May 10, 11[C07C]
7922980 EB/SM splitter heat recoveryNov 02, 09Apr 12, 11[C07C, B01J]
7923589 Alkylaromatics production using dilute alkeneMar 01, 06Apr 12, 11[C07C]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
8217214 Process for preparing ethylbenzene using vapor phase alkylation and liquid phase transalkylationExpiredMar 31, 11Jul 10, 12[C07C]
2012/0053,383 METHOD FOR PRODUCING OLEFINS BY DILUTE FEED CRACKING OF REFINERY OFF-GAS AND OTHER LIGHT HYDROCARBONSAbandonedAug 25, 11Mar 01, 12[C07C, C10G]
2011/0168,604 METHOD FOR CO-HYDROGENATING LIGHT AND HEAVY HYDROCARBONSAbandonedJan 12, 10Jul 14, 11[B01J, C10G]
7752887 Detection of impurities in gas streamsExpiredJan 22, 08Jul 13, 10[G01N]
2009/0269,252 Operation of catalyst withdrawal wells with packingAbandonedApr 23, 08Oct 29, 09[F27B]
2009/0203,951 Method and apparatus for capturing and using heat generated by the production of light olefinsAbandonedFeb 11, 08Aug 13, 09[C07C, B01J]
6923940 Riser termination deviceExpiredJul 10, 03Aug 02, 05[B01J, B01D]
6905591 Deep catalytic cracking processExpiredSep 30, 03Jun 14, 05[C10G]
6772830 Enhanced crossflow heat transferExpiredApr 05, 02Aug 10, 04[F28D]
6751527 Heat and material balance method of process control for petrochemical plants and oil refineriesExpiredFeb 09, 01Jun 15, 04[G05B]
2003/0127,358 Deep catalytic cracking processAbandonedJan 10, 02Jul 10, 03[B01J, C01G]
6576132 Quench water pretreat processExpiredFeb 12, 02Jun 10, 03[B01D]
6482312 Particulate solids cracking apparatus and processExpiredJan 03, 94Nov 19, 02[C10G]
6297414 Deep selective hydrogenation processExpiredOct 08, 99Oct 02, 01[C07C]
5976355 Low residence time catalytic cracking processExpiredDec 14, 95Nov 02, 99[C10G]
5939596 Butadiene removal system for ethylene plants with front end hydrogenation systemsExpiredJan 12, 98Aug 17, 99[C07C]
5837129 Process and apparatus for separating fluidized cracking catalysts from hydrocarbon vaporExpiredMay 02, 94Nov 17, 98[B04C, C10G, B01D]
5768715 Padded head protectorExpiredMar 13, 97Jun 23, 98[A42B]
5435906 Process for catalytically cracking feedstocks paraffin rich comprising high and low concarbon componentsExpiredAug 09, 93Jul 25, 95[C01G]
5340545 Particulate solids cracking apparatusExpiredFeb 10, 93Aug 23, 94[F27B, B01J]

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