ESSEF CORPORATION, D/B/A PENTAIR WATER TREATMENT

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B29C SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 3122
 
  
 
F16L PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL367
 
  
 
B65H HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES277
 
  
 
B65D CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES 197
 
  
 
E03F SEWERS; CESSPOOLS111
 
  
 
F04B POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS 161
 
  
 
F17C VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES 126

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7090736 Pressure vessel prestressing techniqueFeb 20, 03Aug 15, 06[B65H]
7017771 Pressure vesselJan 21, 03Mar 28, 06[F17C]
6660214 Pressure vessel manufacture methodFeb 20, 02Dec 09, 03[B29C]
6565793 Method for fabricating composite pressure vesselsSep 11, 98May 20, 03[B29C]
5819978 Two piece composite inletApr 24, 97Oct 13, 98[B65D]
5806705 Sealing technique for hydropneumatic pressure vesselDec 05, 97Sep 15, 98[F16L]
5526994 Filament-wound isotensoid pressure vessels having geodesic domesDec 01, 94Jun 18, 96[B65H]
5388720 Flanged diffuser and air cell retainer for pressure vesselApr 15, 94Feb 14, 95[F16L]
5368073 Hydropneumatic pressure vessel having an improved diaphragm assemblyOct 07, 93Nov 29, 94[F16L]
5356589 Method and apparatus for forming rotationally cast tank liner having an end fittingMar 09, 93Oct 18, 94[B29C]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6932391 Quick-release fitting assemblyExpiredFeb 05, 03Aug 23, 05[F16L]
2005/0006,824 Fiber reinforced thermoplastic pressure vesselsAbandonedFeb 13, 02Jan 13, 05[B29C]
6793095 Blow-molded pressure tank with spin-welded connectorExpiredFeb 04, 98Sep 21, 04[B65D]
6485668 Method for fabricating composite pressure vessels and products fabricated by the methodExpiredDec 30, 98Nov 26, 02[B29C]
6298553 Composite pressure vessel with heat exchangerExpiredApr 16, 98Oct 09, 01[B23P]
6190598 Method for making thermoplastic composite pressure vesselsExpiredSep 11, 98Feb 20, 01[B29C, B29D, B32B]
6171423 Method for fabricating composite pressure vesselsExpiredSep 11, 98Jan 09, 01[B29C]
6061499 Composite instantaneous water heaterExpiredMar 26, 98May 09, 00[F24H]
5900107 Fitting installation process and apparatus for a molded plastic vesselExpiredSep 11, 96May 04, 99[B29C]
5878773 Auxiliary flow path valveExpiredSep 15, 97Mar 09, 99[F16K]
5866001 Filament wound housing for a reverse osmosis filter cartridgeExpiredAug 21, 96Feb 02, 99[B01D]
5759387 Grey water filter tank recovery system and filter backwashing systemExpiredSep 26, 96Jun 02, 98[B01D]
5759414 Swimming pool main drain assemblyExpiredNov 07, 96Jun 02, 98[E04H]
5574334 Submerged lamp with self grounding sleeveExpiredMar 13, 95Nov 12, 96[H01J, F21V]
5568878 Filament wound pressure vessel having a reinforced access openingExpiredJan 11, 96Oct 29, 96[B65D]
5556497 Fitting installation processExpiredJan 09, 95Sep 17, 96[B29C]
5545952 Self grounding lamp for special use in an underwater environmentExpiredDec 16, 94Aug 13, 96[H01J]
5484079 Hydropneumatic filament-wound pressure vesselExpiredMar 13, 95Jan 16, 96[F16L]
5308386 Air relief valve for a pressure vesselExpiredFeb 03, 93May 03, 94[B01D]
5121852 Dynamic pressure relief seal for pressure vesselsExpiredAug 08, 91Jun 16, 92[F16J]

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