FILTRA-SYSTEMS COMPANY

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 3131

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7727295 Decentralized oil mist collection systemOct 26, 07Jun 01, 10[F16K, B01D]
5624579 Method of simultaneously indexing permanent and disposable filter media in a vacuum filter apparatusSep 28, 95Apr 29, 97[B01D]
5601729 Filter apparatus and method with media edge sealingDec 06, 95Feb 11, 97[B01D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6538430 Screening test for transverse magnetic-field excited noise in giant magnetoresistive headsExpiredAug 23, 01Mar 25, 03[G11B, G01R]
5565112 Method for retrofitting filters with permanent filter media beltExpiredJun 20, 94Oct 15, 96[B01D]
4738777 Pressure filter media mounting assemblyExpiredJun 12, 86Apr 19, 88[B01D]
4738786 Pressure filter enclosureExpiredJun 12, 86Apr 19, 88[B01D]
4721040 Seamless pressure responsive diaphragm installationExpiredAug 11, 86Jan 26, 88[B31B, B30B]
4714557 Pressure filter cake-breaking method and apparatusExpiredJun 12, 86Dec 22, 87[B01D]
4702845 Rotary drum filterExpiredFeb 06, 86Oct 27, 87[B01D]
4693836 Filter apparatus with bypass preventionExpiredApr 28, 86Sep 15, 87[B01D]
4661251 Filter unit with filter media arrangement for engagement with conveyor flightsExpiredDec 09, 85Apr 28, 87[B01D]
4622144 Pressure filter apparatusExpiredJun 21, 84Nov 11, 86[B01D]
4571302 Relieving pressure differential in vacuum filterExpiredDec 31, 84Feb 18, 86[B01D]
4514301 Continuous media filterExpiredAug 24, 81Apr 30, 85[B01D]
4512901 Solvent addition to deep bed filterExpiredAug 11, 80Apr 23, 85[B01D]
4396505 Filtration system pump arrangementExpiredDec 10, 81Aug 02, 83[B01D]
4312764 Filtration system with bi-flow filterExpiredSep 11, 80Jan 26, 82[B01D]
4256578 Waste oil recovery processExpiredNov 29, 79Mar 17, 81[C10M]
4250036 Conveying means for use in filtering devicesExpiredAug 09, 79Feb 10, 81[B01D]
4234429 System for separating particulate matter into soluble and insoluble portionsExpiredFeb 26, 79Nov 18, 80[B01D]
4192747 Liquid-solid separatorExpiredNov 06, 78Mar 11, 80[B01D]
4190533 Filter methodExpiredFeb 12, 76Feb 26, 80[B01D]

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