Issued Patents All Time
Showing 1–25 of 61 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8650737 | Making an elongated product | Franz-Josef Riesselmann, Ralf Winterstein, Reinhold Freermann, Lars Hoving | 2014-02-18 |
| 8470423 | Plastics pipe | — | 2013-06-25 |
| 8453310 | Making an elongated product | Franz-Josef Riesselmann, Ralf Winterstein, Reinhold Freermann, Lars Hoving | 2013-06-04 |
| 7381454 | Tubular product | Kari Kirjavainen | 2008-06-03 |
| 7077164 | Pipe | Kari Kirjavainen | 2006-07-18 |
| 7007716 | Branchtubing for pipework | Jarmo Smahl | 2006-03-07 |
| 6998588 | Heat fusion fitting | David Charles Harget | 2006-02-14 |
| 6959736 | Multilayer pipe and method for manufacturing one | — | 2005-11-01 |
| 6689472 | Apparatus for extrusion of polymers and plastic products formed with the apparatus | Kari Kirjavainen, Michael Sjoberg | 2004-02-10 |
| 6672324 | Method of manufacturing branched pipe, pipe manufacturing apparatus and branched pipe | — | 2004-01-06 |
| 6638589 | Method and apparatus for using recycled plastic material, and a plastic product made by an extruder | — | 2003-10-28 |
| 6585924 | Heat fusion fitting | David Charles Harget | 2003-07-01 |
| 6551534 | Method and arrangement for cooling an extruded hollow product | Kari Kirjavainen | 2003-04-22 |
| 6550500 | Plastic pipe having a socket, and a method of providing a plastic pipe with a socket | Esko Hippeläinen | 2003-04-22 |
| 6446674 | Method of producing homogeneous material with an extruder, an extruder, and a multilayer plastic pipe | Esko Hippeläinen, Kari Kirjavainen | 2002-09-10 |
| 6416211 | Method and apparatus for molding plastic | Kari Kirjavainen | 2002-07-09 |
| 6375226 | Pipe connector having mechanical and fusion connections | Alan J. Dickinson | 2002-04-23 |
| 6372168 | Method of manufacturing branched pipe | — | 2002-04-16 |
| 6309574 | Extrusion of high molecular weight polymers | Kari Kirjavainen, Michael Sjoberg | 2001-10-30 |
| 6306326 | Extrusion method, extruder and extruded product | Kari Kirjavainen | 2001-10-23 |
| 6302983 | Method for lining underground pipelines | Lennart Agren, Arne Lund, Alan J. Dickinson, Veli-Pekka Jormakka, Bo Mollsjo +1 more | 2001-10-16 |
| 6296804 | Biaxial stretching of plastic tubes | Peter Glanville Chapman | 2001-10-02 |
| 6274071 | Method and apparatus for preparing an extrudable product, and an extruded product | Kari Kirjavainen | 2001-08-14 |
| 6217206 | Extruder with rotor and bearings that receive forces acting on the rotor | Kari Kirjavainen | 2001-04-17 |
| 6210617 | Apparatus and method for adjusting a mandrel and kernel while producing a plastic pipe | Eino Holso | 2001-04-03 |