Warman International Limited

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B22D CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 148
 
  
 
C21D MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS 144
 
  
 
C22F CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS 136

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
D464067 Feed housing for a hydrocyclone feed assemblyDec 22, 99Oct 08, 02[1509]
D456429 Feed housing liner for a hydrocyclone feed assemblyDec 22, 99Apr 30, 02[1509]
D415507 Hydrocyclone feed assembly cover linerAug 05, 98Oct 19, 99[1509]
D415181 Hydrocyclone feed assembly housing linerAug 05, 98Oct 12, 99[1509]
D415182 Hydrocyclone feed assembly housingAug 05, 98Oct 12, 99[1509]
D414789 Hydrocyclone feed assembly coverAug 05, 98Oct 05, 99[1509]
5803152 Microstructurally refined multiphase castingsJun 18, 96Sep 08, 98[B22D, C22F, C21D]
D381339 Pump casingJan 16, 96Jul 22, 97[1502]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6106230 Centrifugal pumpExpiredSep 29, 98Aug 22, 00[F01D]
5772218 Uniform compression gland seal assemblyExpiredDec 12, 96Jun 30, 98[F16J]
5685692 Pump housing assemblyExpiredDec 04, 95Nov 11, 97[F01D]
5642892 Gland seal assembly housingExpiredSep 12, 95Jul 01, 97[F16J]
5586966 Apparatus and method for separating solid/fluid mixturesExpiredMar 18, 96Dec 24, 96[B04B]
5582200 Gate valve with spring assisted valve linerExpiredMay 05, 95Dec 10, 96[F16L]
D368913 Pump casing and pump casing partsExpiredDec 06, 94Apr 16, 96[]
5413140 Spring-assisted split seat gate valveExpiredJun 29, 94May 09, 95[F16L]
5195867 Slurry pump shaft seal flushingExpiredMar 05, 92Mar 23, 93[F01D]
5141390 Vertical axis centilevered pump provided with a stabilizing by-pass flowExpiredMay 29, 90Aug 25, 92[F01D]
5112039 Annular elastomeric slurry sealExpiredApr 10, 91May 12, 92[F16J]
5078410 Centrifugal sealExpiredOct 30, 89Jan 07, 92[F16J]
5051071 Heat dissipating coupling for rotary shaftsExpiredFeb 09, 90Sep 24, 91[F04B]
5029878 Elastomeric pump casing sealExpiredNov 23, 88Jul 09, 91[F16J]
4913619 Centrifugal pump having resistant componentsExpiredAug 08, 88Apr 03, 90[F04D]
4883403 Impellers for centrifugal pumpsExpiredAug 05, 88Nov 28, 89[F01D]
4854828 Remotely removable and replaceable motor for hazardous service pump installationExpiredMay 30, 86Aug 08, 89[F04B]
4844693 Low-flow pump casingExpiredOct 28, 87Jul 04, 89[F04D]
4747757 Submersible mixing pumpExpiredNov 26, 86May 31, 88[F04B, B01F]
4700808 Shaft mounted bearing lubricating deviceExpiredJul 17, 86Oct 20, 87[F16N]

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