PERMEA, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 8126
 
  
 
B01F MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING 240
 
  
 
B01B BOILING; BOILING APPARATUS13

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6138995 Dispense of beverage containing controlled levels of dissolved gasMar 31, 98Oct 31, 00[B01F]
5779897 Hollow fiber membrane device with inert filaments randomly distributed in the inter-fiber voidsNov 08, 96Jul 14, 98[B01D]
5641337 Process for the dehydration of a gasDec 08, 95Jun 24, 97[B01D]
5565149 Control of dissolved gases in liquidsJan 31, 96Oct 15, 96[B01F]
5525143 Hollow fiber membrane dryer with internal sweepOct 17, 94Jun 11, 96[B01D]
5500036 Production of enriched oxygen gas stream utilizing hollow fiber membranesOct 17, 94Mar 19, 96[B01D]
5306427 Low pressure feed membrane separation processJul 12, 93Apr 26, 94[B01D]
5282969 High pressure feed membrane separation processApr 29, 93Feb 01, 94[B01B]
5259869 Use of membrane separation to dry gas streams containing water vaporMay 06, 92Nov 09, 93[B01D]
5252219 Compressed permeate sweep membrane separation processDec 18, 92Oct 12, 93[B01D]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5655570 Condensate drain deviceExpiredMay 21, 96Aug 12, 97[F15D]
5514413 Process for producing composite membranesExpiredMar 31, 94May 07, 96[B05D]
5306331 Process for cooling the feed gas to gas separation systemsExpiredMar 18, 93Apr 26, 94[B01D]
5215554 Membranes having enhanced selectivity and method of producing such membranesExpiredMay 11, 92Jun 01, 93[B01D]
5207906 Membrane separation moduleExpiredJul 28, 92May 04, 93[B01D]
5176725 Multiple stage countercurrent hollow fiber membrane moduleExpiredJul 26, 91Jan 05, 93[B01D]
5030251 System and method for separating a portion of a gas from a mixture of gasesExpiredOct 24, 90Jul 09, 91[B01D]
5013767 Asymmetric gas separation membranes having improved strengthExpiredSep 27, 89May 07, 91[C08J]
4992221 Asymmetric gas separation membranes having improved strengthExpiredAug 24, 90Feb 12, 91[D01D]
4894068 Process for capturing nitrogen from air using gas separation membranesExpiredDec 27, 88Jan 16, 90[B01D]
4880441 Asymmetric gas separation membranes having graded density skinsExpiredJan 12, 89Nov 14, 89[B01D]
4871494 Process for forming asymmetric gas separation membranes having graded density skinsExpiredJul 06, 87Oct 03, 89[D01D]
4806189 Composite fluid separation membranesExpiredAug 13, 84Feb 21, 89[B32B, B01D]
4793830 Process for producing high quality gas for instrumentation application using gas separation membranesExpiredDec 28, 87Dec 27, 88[B01D]
4783201 Gas dehydration membrane apparatusExpiredDec 28, 87Nov 08, 88[B01D]
4783202 Polyphosphazene membrane separation of polar from non-polar fluidsExpiredNov 27, 84Nov 08, 88[B01D]
4728345 Multicomponent gas separation membranes having polyphosphazene coatingsExpiredDec 28, 83Mar 01, 88[B01D]
4728346 Permeation modified asymmetric gas separation membranes having graded density skinsExpiredAug 15, 86Mar 01, 88[B01D]
4710204 Polyphosphazene gas separation membranesExpiredDec 28, 83Dec 01, 87[B01D]
4701186 Polymeric membranes with ammonium saltsExpiredJun 30, 83Oct 20, 87[B01D]

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