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Dirk M. Koenhen
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Dedemsvaart, NL
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Patents Grants
last 30 patents
Information
Patent Grant
Method for manufacturing multiple channel membranes, multiple chann...
Patent number
6,787,216
Issue date
Sep 7, 2004
inge AG
Dirk Marinus Koenhen
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Grant
Longitudinal reinforced self-supporting capillary membranes and the...
Patent number
6,454,943
Issue date
Sep 24, 2002
S. Search B.V.
Dirk Marinus Koenhen
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Device for filtering a liquid and method for disinfecting such a de...
Patent number
6,203,714
Issue date
Mar 20, 2001
SepeQ B.V.
Meindert Bos
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Method for the removal of components causing turbidity, from a flui...
Patent number
5,560,828
Issue date
Oct 1, 1996
X-Flow B.V.
Gede Wenten
A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
Information
Patent Grant
Microfiltration and/or ultrafiltration membrane, method of preparat...
Patent number
5,456,843
Issue date
Oct 10, 1995
X-Flow B.V.
Dirk M. Koenhen
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Process for the separation of components in an organic liquid mediu...
Patent number
5,338,455
Issue date
Aug 16, 1994
X-Flow B.V.
Dirk M. Koenhen
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Semipermeable composite membrane, a process for the manufacture the...
Patent number
5,274,047
Issue date
Dec 28, 1993
X-Flow B.V.
Dirk M. Koenhen
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Process for the preparation of hydrophilic membranes and such membr...
Patent number
RE34296
Issue date
Jun 29, 1993
X-Flow B.V.
Hendrik D. W. Roesink
521 - Synthetic resins or natural rubbers
Information
Patent Grant
Semi-permeable composite membrane and process for manufacturing same
Patent number
5,207,908
Issue date
May 4, 1993
X-Flow B.V.
Dirk M. Koenhen
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Method for producing a flat porous product
Patent number
5,169,575
Issue date
Dec 8, 1992
X-Flow B.V.
Dirk M. Koenhen
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information
Patent Grant
Process for preparing a microporous membrane and such a membrane
Patent number
5,076,925
Issue date
Dec 31, 1991
X-Flow B.V.
Hendrik D. W. Roesink
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Process for the preparation of hydrophilic membranes and such membr...
Patent number
4,798,847
Issue date
Jan 17, 1989
X-Flow B.V.
Hendrik D. W. Roesink
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL