Welker Engineering Company

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 11195
 
  
 
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING1063
 
  
 
B01D SEPARATION 3131
 
  
 
B01F MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING 339
 
  
 
F15D FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS 38
 
  
 
G01F MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME 257
 
  
 
G01K MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR 244
 
  
 
B05B SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES 163
 
  
 
C10J PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES 120
 
  
 
F04B POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS 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
7493914 Newtonian thrust cowl arrayJul 20, 05Feb 24, 09[F16K]
7471882 Heated regulator with removable heat inducer and fluid heater and methods of useSep 16, 05Dec 30, 08[H05B]
7194920 Sensor probe and pipeline construction and methodMar 15, 05Mar 27, 07[G01F]
7156123 Pressure reduction system for quick-connectsMar 30, 05Jan 02, 07[F16K]
6964517 Temperature probe and insertion deviceJul 12, 04Nov 15, 05[G01K]
6827486 Temperature probe and insertion deviceNov 22, 02Dec 07, 04[G01K]
6818045 Liquid separator with integral sight glassNov 05, 02Nov 16, 04[B01D]
6764536 Sampling device with liquid eliminatorNov 22, 02Jul 20, 04[B01D]
6761757 Instrument probe with valve and separatorOct 28, 02Jul 13, 04[G01N, B01D]
6439267 Adjustable flow diffuserJun 29, 01Aug 27, 02[F15D]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2004/0099,068 Sampling cylinder apparatusAbandonedNov 22, 02May 27, 04[G01N]
5769375 Positionable holder for sample cylinderExpiredJan 11, 96Jun 23, 98[F21L]
5303599 Miniaturized samplerExpiredJul 29, 92Apr 19, 94[G01N]
5098847 Method and apparatus for portable testing of products from processing columnExpiredAug 24, 90Mar 24, 92[G01N]
4942772 Stack sampling systemExpiredJun 19, 89Jul 24, 90[G01N]
4928536 Fluid sample apparatus featuring integral construction with a motor driven sampling systemExpiredOct 10, 89May 29, 90[G01N]
4922764 Constant pressure sample cylinder with spheroid mixerExpiredSep 12, 88May 08, 90[G01N]
4908567 Power supply system for an optical inspection apparatusExpiredFeb 21, 89Mar 13, 90[G05F]
4882939 Purge valveExpiredSep 12, 88Nov 28, 89[G01N]
4850669 Explosion-proof optical fiber connector for a light sourceExpiredJun 27, 88Jul 25, 89[F21V, G02B]
4841785 Vanishing chamber construction for liquid samplerExpiredJun 27, 88Jun 27, 89[G01N]
4829835 Adjustable sand relief valve for sand laden crude oilExpiredJun 22, 87May 16, 89[G01N]
4830334 Resilient plug construction for a flow regulator incorporating stress limiting meansExpiredOct 03, 88May 16, 89[F16K]
4777567 Optical inspection apparatusExpiredAug 15, 86Oct 11, 88[F21V]
4678290 Apparatus for visual inspection of closed machineryExpiredAug 30, 85Jul 07, 87[F21V, F21L, A61B, G02B]
4631967 Automatic insertion deviceExpiredMay 17, 85Dec 30, 86[G01N]
4628750 Integrated pump and sample vesselExpiredSep 27, 84Dec 16, 86[G01N]
4557151 Sampler incorporating pressure balanced check valveExpiredJan 07, 83Dec 10, 85[G01N]
4525127 Fluid pump mechanismExpiredJan 05, 81Jun 25, 85[F04B]
4470773 Resilient chamber fluid sampler having vacuum breaker apparatusExpiredSep 20, 82Sep 11, 84[F04B]

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