PROCESS SYSTEMS INTERNATIONAL, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 1133
 
  
 
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
5188519 Saturated fluid pumping apparatusJul 11, 91Feb 23, 93[F04B]
RE31665 Cryopump apparatusJun 08, 83Sep 11, 84[B01D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5315832 Process for the recovery of a light hydrocarbon fraction from marine loading operationsExpiredFeb 12, 93May 31, 94[F25J]
5176002 Method of controlling vapor loss from containers of volatile chemicalsExpiredApr 10, 91Jan 05, 93[F17C]
5142443 Cryogenic cooling of circuit boardsExpiredApr 29, 91Aug 25, 92[H05K]
4681612 Process for the separation of landfill gasExpiredJan 24, 86Jul 21, 87[F25J]
4584839 Multi-stage cryogenic refrigeratorsExpiredJul 02, 84Apr 29, 86[F25B]
RE32068 Distillative separation employing bottom additivesExpiredFeb 22, 85Jan 21, 86[F25J]
4524586 Cryogenic refrigeratorExpiredApr 09, 84Jun 25, 85[F25B]
4522033 Cryogenic refrigerator with gas spring loaded valveExpiredJul 02, 84Jun 11, 85[F25B]
4520630 Cryogenic refrigerator and heat sourceExpiredMar 06, 84Jun 04, 85[F25B]
4502714 Vacuum spool piece and jointExpiredSep 29, 82Mar 05, 85[F16L]
4481777 Cryogenic refrigeratorExpiredJun 17, 83Nov 13, 84[F25B]
4471626 Cryogenic refrigeratorExpiredMay 31, 83Sep 18, 84[F25B]
4466252 CryopumpExpiredSep 29, 82Aug 21, 84[B01D]
4462419 Thermal blocked valveExpiredMay 17, 82Jul 31, 84[F16K]
4438631 Cryogenic refrigeratorExpiredJul 15, 82Mar 27, 84[F25B]
4428759 Distillative separation employing bottom additivesExpiredJan 14, 83Jan 31, 84[F25J]
4416855 Radioactive waste treatment apparatusExpiredFeb 09, 81Nov 22, 83[G21F, B01J, B01D]
4391103 Fluidic cryogenic refrigeratorExpiredApr 19, 82Jul 05, 83[F25B]
4389850 Hybrid cryogenic refrigeratorExpiredApr 19, 82Jun 28, 83[F25B]
4388809 Cryogenic refrigeratorExpiredApr 19, 82Jun 21, 83[F25B]

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