Microporous asymmetric polyamide membranes

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4770777
SERIAL NO

07008227

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Integral gradient, skinned, submicroscopically porous, anisotropic, hydrophilic, asymmetric polyamide membranes comprising: (a) a first porous polyamide zone obtained from a polyamide solution formulated to give coagulated film with pores of a given size, (b) a fabric support imbedded in the first porous polyamide layer, and (c) a second porous polyamide zone having a skinned outer surface, obtained from a polyamide solution having the same constituents as the solution used to form the first porous polyamide zone but solution post-treated to give pores substantially smaller than those in the first porous polyamide zone, as well as a process for producing such membranes, are disclosed.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
Parker Intangibles Inc.WILMINGTON, DE8

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Laccetti, Anthony J Shelton, CT 16 187
Steadly, Harvey Westport, CT 1 50

Cited Art Landscape

Patent Info (Count) # Cites Year
 
SPECIALTY MATERIALS INC. (1)
* 4707265 Reinforced microporous membrane 71 1985
 
MEMTEC LIMITED (1)
* 4623463 Formation of porous membranes 12 1985
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
GENERAL ELECTRIC COMPANY (2)
8961790 Separator assembly 0 2011
9795924 Central core element for a separator assembly 0 2011
 
Other [Check patent profile for assignment information] (3)
* 2004/0124,135 Unsupported multizone microporous membrane 10 2003
* 2005/0063,897 Agglomerated nanoparticles having a rutile-like crystalline phase 1 2004
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AQUAMARIJN HOLDING B.V. (2)
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3M INNOVATIVE PROPERTIES COMPANY (14)
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6267916 Process of making microporous phase inversion membranes 14 1999
6280791 Process of making a three-region reinforced microporous filtration membrane 18 2000
6513666 Reinforced, three zone microporous membrane 32 2001
6706184 Unsupported multizone microporous membrane 18 2001
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6994789 Pre-metered, unsupported multilayer microporous membrane 9 2004
* 2004/0154,978 Pre-metered, unsupported multilayer microporous membrane 5 2004
7304106 Compositions including nanoparticles having a rutile-like crystalline phase, and methods of making the same 1 2004
7250118 Agglomerated nanoparticles having a rutile-like crystalline phase 1 2004
* 2005/0065,222 Compositions including nanoparticles having a rutile-like crystalline phase, and methods of making the same 5 2004
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WIX FILTRATION CORP. (1)
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MICRODYN-NADIR US, INC. (2)
7585411 Low pressure filtration 3 2006
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PALL CORPORATION (5)
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* 5736051 Polyvinylidene fluoride membrane and method for removing viruses from solutions 49 1994
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* 2015/0246,328 COMPOSITE POROUS POLYMERIC MEMBRANE WITH HIGH VOID VOLUME 7 2014
 
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HYDRATION SYSTEMS, LLC (1)
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AKTIEBOLAGET ELECTROLUX (1)
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EMD MILLIPORE CORPORATION (19)
7229665 Process of forming multilayered structures 11 2001
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8123992 Process of forming multilayered structures 0 2003
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7560024 Method and system for controlling pore size of microporous phase inversion membranes 5 2003
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7208200 Process of forming multilayered structures 15 2003
* 2004/0084,364 Process of forming multilayered structures 4 2003
8292090 Process of forming multilayered structures 0 2004
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8061532 Process of forming multilayered structures 7 2006
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8292091 Process of forming multilayered structures 0 2006
7891500 Process of forming multilayered structures 7 2009
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8181792 Process of forming multilayered structures 4 2010
 
NEXUS DX, INC. (1)
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CUNO, INCORPORATED, A CORPORATION OF THE STATE OF DELAWARE (4)
6413070 System for manufacturing reinforced three-zone microporous membrane 37 2000
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CARBON SINK INC. (17)
8088197 Removal of carbon dioxide from air 22 2006
8715393 ) from air 9 2008
8133305 Removal of carbon dioxide from air 26 2008
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8262774 English Title Not Available 5 2008
* 2009/0130,321 AIR COLLECTOR WITH FUNCTIONALIZED ION EXCHANGE MEMBRANE FOR CAPTURING AMBIENT CO2 16 2008
8999279 English Title Not Available 5 2009
8337589 Method and apparatus for extracting carbon dioxide from air 5 2010
8273160 Method and apparatus for extracting carbon dioxide from air 7 2010
8083836 Method and apparatus for extracting carbon dioxide from air 25 2010
8246723 English Title Not Available 4 2011
8221527 English Title Not Available 8 2011
9205372 English Title Not Available 2 2012
9266051 Removal of carbon dioxide from air 2 2013
9616375 Capture of carbon dioxide (CO2) from air 0 2014
9266052 Method and apparatus for extracting carbon dioxide from air 2 2014
9527747 Extraction and sequestration of carbon dioxide 0 2014
* Cited By Examiner