ING. WALTER HENGST GMBH & CO. KG

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 11123
 
  
 
F01M LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL-COMBUSTION ENGINES; CRANKCASE VENTILATING 231
 
  
 
F02M SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF 182
 
  
 
F16B DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING 148

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE38917 Fluid filter with filter bypass valve and sealing surface on filter element sideApr 28, 00Dec 13, 05[B01D]
6626163 Oil separator for de-oiling crankcase ventilation gases of an internal combustion engineDec 22, 00Sep 30, 03[F01M]
6505615 Device to deoil the crankcase ventilation gases of an internal combustion engineJan 29, 02Jan 14, 03[F02M]
6279556 Oil separator for removing oil from the crankcase ventilation gases of an internal combustion engineJan 11, 01Aug 28, 01[F01M]
6086763 Disk, in particular the front disk of a filter elementOct 19, 98Jul 11, 00[B01D]
6016923 Filter cartridge for a filter for filtering liquid or gaseous mediaNov 01, 96Jan 25, 00[B01D]
5922196 Liquid filter with connection flangeAug 15, 97Jul 13, 99[B01D]
5753116 Coolant filterOct 28, 96May 19, 98[B01D]
5718825 Liquid filter, in particular fuel or oil filterDec 07, 95Feb 17, 98[B01D]
5688396 Oil filter including an angled mounting surfaceNov 08, 95Nov 18, 97[B01D]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7066726 Device and method for melting and conveying materialExpiredJun 30, 01Jun 27, 06[B29C]
2003/0173,053 Device for producing castings that comprises a wall can be guided into the casting moldAbandonedJul 10, 02Sep 18, 03[B22D]
6591807 Combination comprising a main unit and at least one add-on functional unitExpiredOct 16, 01Jul 15, 03[F02B]
4948503 Oil filter cover in combination with an oil filter cartridgeExpiredNov 01, 88Aug 14, 90[B01D]
4906365 Filter for cleaning lubricating oilExpiredNov 01, 88Mar 06, 90[B01D]
4811719 Fuel preheaterExpiredApr 23, 87Mar 14, 89[F03M]
4793407 Heat exchanger for two fluid mediaExpiredApr 23, 87Dec 27, 88[F28D]
4729427 Heat exchangerExpiredApr 23, 87Mar 08, 88[F28D]

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