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Gunnar Blomqvist
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Helsingby, FI
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Patents Grants
last 30 patents
Information
Patent Grant
Device for internal cooling of extruded thermoplastics pipes
Patent number
8,062,013
Issue date
Nov 22, 2011
Oy Kwh Pipe Ab
Gunnar Blomqvist
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Preparation of an end of a thermoplastics tube manufactured by spir...
Patent number
6,666,945
Issue date
Dec 23, 2003
Oy KWH Pipe Ab
Anders Andtbacka
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Method for joining spiral wound pipes
Patent number
6,322,653
Issue date
Nov 27, 2001
Oy Kwh Pipe Ab
Gunnar Blomqvist
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Welding method in the manufacture of a spirally wound tube and a we...
Patent number
5,591,292
Issue date
Jan 7, 1997
Oy KWH Pipe Ab
Gunnar Blomqvist
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Method for joining spirally wound thermoplastic pipes together
Patent number
5,431,762
Issue date
Jul 11, 1995
Oy KWH Pipe Ab
Gunnar Blomqvist
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Method for manufacturing a joint pipe
Patent number
5,411,619
Issue date
May 2, 1995
Oy KWH Pipe Ab
Kristian Sundqvist
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Plastic tube formed by spiral winding of hollow section
Patent number
5,127,442
Issue date
Jul 7, 1992
Oy KWH Pipe Ab
Gunnar Blomqvist
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Patents Applications
last 30 patents
Information
Patent Application
METHOD AND DEVICE FOR JOINING PIPES
Publication number
20100213701
Publication date
Aug 26, 2010
Oy KWH Pipe Ab
Gunnar Blomqvist
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Application
METHOD AND DEVICE FOR INTERNAL COOLING OF EXTRUDED THERMOPLASTICS P...
Publication number
20090139695
Publication date
Jun 4, 2009
Oy KWH Pipe Ab
Gunnar Blomqvist
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL