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James S. Johnson
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Acton, MA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Non-cracking hydrophilic polyethersulfone membranes
Patent number
6,465,050
Issue date
Oct 15, 2002
Osmonics, Inc.
Michael J. Witham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Non-cracking hydrophilic polyethersulfone membranes
Patent number
6,193,077
Issue date
Feb 27, 2001
Osmonics, Inc.
Michael J. Witham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Preparation of polyethersulfone membranes
Patent number
6,056,903
Issue date
May 2, 2000
Osmonics, Inc.
John M. Greenwood
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Vacuum filter funnel
Patent number
5,695,639
Issue date
Dec 9, 1997
Micron Separations, Inc.
James S. Johnson
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Aromatic/aliphatic nylon polymer microporous membranes
Patent number
5,693,231
Issue date
Dec 2, 1997
Micron Separations, Inc.
James S. Johnson
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Alcohol-insoluble nylon microporous membranes
Patent number
5,411,663
Issue date
May 2, 1995
Micron Separations, Inc.
James S. Johnson
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Heat resistant microporous material production and products
Patent number
5,215,662
Issue date
Jun 1, 1993
Micron Separations Inc.
James S. Johnson
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Process for producing supported celluosic membranes and products
Patent number
4,894,157
Issue date
Jan 16, 1990
Micron Separations, Inc.
James S. Johnson
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Patents Applications
last 30 patents
Information
Patent Application
Non-cracking hydrophilic polyethersulfone membranes
Publication number
20010021421
Publication date
Sep 13, 2001
Michael J. Witham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL