Severn Trent Water Purification, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 7127
 
  
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 550
 
  
 
E04B GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS 245
 
  
 
E04C STRUCTURAL ELEMENTS; BUILDING MATERIALS 224
 
  
 
A47L DOMESTIC WASHING OR CLEANING 159
 
  
 
A61N ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY 1106
 
  
 
B08B CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL 157
 
  
 
H01J ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS 1127

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8343343 Underdrain apparatusMay 12, 10Jan 01, 13[B01D]
8269190 Method and system for achieving optimal UV water disinfectionSep 10, 10Sep 18, 12[H01J]
8069630 System and method for interlocking support blocksMar 27, 07Dec 06, 11[E04B, E04C, B01D]
7997041 System method for interlocking support blocksFeb 15, 06Aug 16, 11[E04B, E04C, B01D]
7396466 Method and system for filtration of wastewaterApr 29, 04Jul 08, 08[C02F]
7141164 Snap locking underdrain blockApr 05, 04Nov 28, 06[B01D]
6610990 UV light sourceJan 29, 02Aug 26, 03[A61N]
6461525 Method for backwashing granular media filters and bioreactorsJul 28, 01Oct 08, 02[B01D]
6143188 Underdrain block for filter media systemDec 22, 98Nov 07, 00[B01D]
6110366 Anchor for an underdrain blockMay 13, 99Aug 29, 00[B01D]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2013/0020,257 Mainstream Wastewater TreatmentAbandonedMar 25, 11Jan 24, 13[C02F]
2012/0024,784 Fluid Gasification/Degasification Apparatuses, Systems, and ProcessesAbandonedMay 11, 11Feb 02, 12[C02F, B01D]
7794673 SterilizerExpiredSep 24, 07Sep 14, 10[G01N, B01J, A62B, A61L]
7615160 Water disinfection apparatusExpiredFeb 27, 07Nov 10, 09[C02F, A61L]
2009/0139,935 Ballast Tank Circulation Management SystemAbandonedDec 31, 08Jun 04, 09[C02F]
2008/0017,586 Ballast tank circulation management systemAbandonedJun 01, 07Jan 24, 08[C02F]
2007/0187,336 Reservoir management systemAbandonedFeb 09, 07Aug 16, 07[C02F]
2007/0007,146 Process for producing hypochloriteAbandonedJul 07, 05Jan 11, 07[C25B]
7153434 Methods for removing contaminants from water and silica from filter media bedsExpiredJun 29, 06Dec 26, 06[C02F]
2006/0185,517 Multi-stage odor scrubberAbandonedFeb 22, 05Aug 24, 06[B01D]
7081636 Pulsed UV light sourceExpiredAug 20, 02Jul 25, 06[G01J]
6818124 Reservoir management systemExpiredSep 13, 01Nov 16, 04[C02F]
2004/0219,683 Method of measuring chlorine content in aqueous solutionAbandonedJul 23, 03Nov 04, 04[G01N]
6811710 Large water reservoir management systemExpiredApr 24, 02Nov 02, 04[C02F]
2004/0164,271 Method of stabilising an oxidant and a stabilised oxidantAbandonedApr 21, 04Aug 26, 04[C09K]
2004/0149,899 Portable light detectorAbandonedMar 05, 04Aug 05, 04[G01N]
6627450 Method of measuring chlorine content in aqueous solutionExpiredFeb 11, 00Sep 30, 03[G01N]

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