STONE & WEBSTER ENGINEERING CORP.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 1133
 
  
 
C07C ACYCLIC OR CARBOCYCLIC COMPOUNDS 1137
 
  
 
C10G CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION 161

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6271433 Cat cracker gas plant process for increased olefins recoveryFeb 22, 99Aug 07, 01[C07C, C10G, B01D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5280756 NO.sub.x Emissions advisor and automation systemExpiredFeb 26, 93Jan 25, 94[F23N]
5160623 Apparatus and process for fluid-fluid contactExpiredSep 12, 91Nov 03, 92[B01D]
5151158 Thermal cracking furnaceExpiredJul 16, 91Sep 29, 92[C10G]
5147511 Apparatus for pyrolysis of hydrocarbonsExpiredNov 29, 90Sep 15, 92[C10G]
5076930 Apparatus and process for liquid-liquid contactExpiredOct 19, 88Dec 31, 91[B01D]
4986956 Passive nuclear power plant containment systemExpiredNov 27, 89Jan 22, 91[G21C]
4909981 Nuclear reactorExpiredFeb 25, 88Mar 20, 90[G21C]
4901829 Frictional shock absorber enclosed within a housingExpiredMar 17, 88Feb 20, 90[F16L, B60T, F16F]
4896496 Single pressure steam bottoming cycle for gas turbines combined cycleExpiredJul 25, 88Jan 30, 90[F02C]
4786462 Support structure for a nuclear reactorExpiredFeb 21, 84Nov 22, 88[G21C]
4765883 Process for the production of aromatics benzene, toluene, xylene (BTX) from heavy hydrocarbonsExpiredOct 20, 82Aug 23, 88[C10G]
4765948 Coolant circulation system for a liquid metal nuclear reactorExpiredAug 29, 86Aug 23, 88[H02K, G21C, G21D]
4761261 Nuclear reactorExpiredFeb 21, 84Aug 02, 88[G21C]
4753773 Double tube steam generatorExpiredDec 26, 85Jun 28, 88[G21C, F22B]
4737337 Nuclear reactor having double tube helical coil heat exchangerExpiredFeb 27, 86Apr 12, 88[G21C]
4737338 Nuclear reactor containing connecting means for connecting a reactor vessel and at least one receiver vesselExpiredMay 07, 86Apr 12, 88[G21C]
4663019 Olefin production from heavy hydrocarbon feedExpiredMar 09, 84May 05, 87[C10G]
4644906 Double tube helical coil steam generatorExpiredMay 09, 85Feb 24, 87[F22B]
D284917 Point of sale display moduleExpiredFeb 14, 84Aug 05, 86[]
4548090 Supersonic vibration driven motor deviceExpiredMar 12, 84Oct 22, 85[F16H]

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