PERMEA, INC.
Patent Owner
Stats
- 11 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Oct 31, 2000 most recent publication
Details
- 11 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 3,110 Total Citation Count
- Sep 13, 1977 Earliest Filing
- 80 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
Rank in Class
Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
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]
5500036 Production of enriched oxygen gas stream utilizing hollow fiber membranesOct 17, 94Mar 19, 96[B01D]
5259869 Use of membrane separation to dry gas streams containing water vaporMay 06, 92Nov 09, 93[B01D]
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
5215554 Membranes having enhanced selectivity and method of producing such membranesExpiredMay 11, 92Jun 01, 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]
4793830 Process for producing high quality gas for instrumentation application using gas separation membranesExpiredDec 28, 87Dec 27, 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]
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