AXELSON, INC., A DE CORP.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F01B MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES 126
 
  
 
F16J PISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS149
 
  
 
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING172

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE33928 Fire-safe valve actuatorAug 28, 90May 19, 92[F01B, F16J]
5067510 Adjustable, fusible, manually operable valve lock-open assemblyFeb 11, 91Nov 26, 91[F16K]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5140894 Gas spring actuatorExpiredJan 16, 91Aug 25, 92[F15B, F01B]
5027847 Pneumatic valve actuator sequencing control system and sequencing relay device incorporated thereinExpiredNov 08, 89Jul 02, 91[G05D]
4974631 Dome pressure maintaining valveExpiredOct 12, 89Dec 04, 90[G05D]
4671312 Wireline cutting actuator and valveExpiredFeb 03, 86Jun 09, 87[F16K]
4625764 Relay valveExpiredApr 03, 86Dec 02, 86[F15B]
4619434 Heat sensitive motor valve jackExpiredFeb 17, 81Oct 28, 86[F16K]
4527770 In-service test valveExpiredJul 06, 84Jul 09, 85[F16K]
4523602 Pressure controllerExpiredJul 22, 83Jun 18, 85[F16K]
4505291 Heat sensitive fire safe valve energy assist deviceExpiredAug 11, 83Mar 19, 85[F16K]
4480653 In-service test valveExpiredAug 12, 82Nov 06, 84[F17D]
4469119 Pilot valve with fusible lockout knobExpiredMar 29, 82Sep 04, 84[F16K]
4434967 Valve self-relieving seatsExpiredAug 23, 82Mar 06, 84[F16K]
4421134 Heat sensitive gate valveExpiredSep 10, 82Dec 20, 83[F16K]
4355658 Pilot valve with indicating lockout knobExpiredDec 15, 80Oct 26, 82[F16K]
4354425 Fire-safe valve actuatorExpiredMay 09, 80Oct 19, 82[F01B, F16J]
4354663 Valve construction for sand and slurry serviceExpiredMar 03, 80Oct 19, 82[F16K]
4319603 Self-contained safety systemExpiredSep 08, 80Mar 16, 82[F16K]
4304250 Flow line control systemExpiredMar 31, 80Dec 08, 81[F16K]
4211250 Pressure relief valveExpiredNov 21, 77Jul 08, 80[F16K]
4186766 Flow line control systemExpiredNov 21, 77Feb 05, 80[F16K]

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