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Risto A. Ljokkoi
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Karhula, FI
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Patents Grants
last 30 patents
Information
Patent Grant
Method for the controlled thickening of low consistency fiber suspe...
Patent number
7,229,527
Issue date
Jun 12, 2007
Andritz-Ahlstrom Oy
Antero Laine
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Apparatus for the thickening of fiber suspensions
Patent number
6,767,432
Issue date
Jul 27, 2004
Andritz Oy
Antero Laine
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Method of manufacturing a wire screen product
Patent number
6,340,805
Issue date
Jan 22, 2002
Andritz-Ahlstrom Oy
Risto Ljokkoi
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Screen cylinder
Patent number
6,119,867
Issue date
Sep 19, 2000
Ahlmstrom Machinery Oy
Risto Ljokkoi
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Screen
Patent number
5,960,962
Issue date
Oct 5, 1999
Ahlstrom Machinery Oy
Risto Ljokkoi
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Method and apparatus for screening fibrous suspensions
Patent number
5,575,395
Issue date
Nov 19, 1996
A. Ahlstrom Corporation
Timo Alajaaski
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Apparatus for treating fiber suspension
Patent number
5,547,083
Issue date
Aug 20, 1996
A. Ahlstrom Corporation
Timo Alajaaski
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Apparatus for treating pulp
Patent number
5,338,451
Issue date
Aug 16, 1994
A. Ahlstrom Corporation
Pentti Lindberg
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Apparatus for treating fiber suspension
Patent number
5,224,603
Issue date
Jul 6, 1993
A. Ahlstrom Corporation
Karim Hanana
B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
Information
Patent Grant
Method and an apparatus for treating fiber suspension
Patent number
5,172,813
Issue date
Dec 22, 1992
A. Ahlstrom Corporation
Risto A. Ljokkoi
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Arrangement for removing thread-like impurities from a defiberizing...
Patent number
5,094,715
Issue date
Mar 10, 1992
Ahlstrom Corporation
Risto Ljokkoi
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Method and apparatus for treating fiber suspension
Patent number
5,000,842
Issue date
Mar 19, 1991
A. Ahlstrom Corporation
Risto A. Ljokkoi
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Method and apparatus for improving the operation of a disc filter
Patent number
4,995,991
Issue date
Feb 26, 1991
Ahlstrom Corporation
Risto Ljokkoi
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information
Patent Grant
Method and apparatus for treating fiber suspension
Patent number
4,915,822
Issue date
Apr 10, 1990
A. Ahlstrom Corporation
Risto A. Ljokkoi
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Patents Applications
last 30 patents
Information
Patent Application
Method and apparatus for the thickening of fiber suspensions
Publication number
20040084160
Publication date
May 6, 2004
ANDRITZ OY
Antero Laine
D21 - PAPER-MAKING PRODUCTION OF CELLULOSE