Issued Patents All Time
Showing 1–25 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11407161 | Finned mold block | Stefan A. Lupke | 2022-08-09 |
| 11156316 | Pipe coupling | Stefan A. Lupke | 2021-10-26 |
| 11148342 | Air pressure control for corrugator | Stefan A. Lupke | 2021-10-19 |
| 11052593 | Die head and die tooling spider with spider legs having curved flow guides | Stefan A. Lupke | 2021-07-06 |
| 10279536 | System and method for identifying thermal expansion issues in a corrugator | Stefan A. Lupke | 2019-05-07 |
| 9969119 | Mold block return | Stefan A. Lupke | 2018-05-15 |
| 8684719 | Die tooling for extruding tubular product | Stefan A. Lupke | 2014-04-01 |
| 8146620 | Non-circular pipe profile | Stefan A. Lupke | 2012-04-03 |
| 8075295 | Alignable cooling plug for extruder | Stefan A. Lupke | 2011-12-13 |
| 7976753 | Method of forming corrugated pipe with a pipe spigot seal seat | Stefan A. Lupke | 2011-07-12 |
| 7798796 | Pipe extruding system with cooling plug separation | Stefan A. Lupke | 2010-09-21 |
| 7625196 | Device for manufacturing a double-walled, thermoplastic tube with a connecting sleeve | Stefan A. Lupke | 2009-12-01 |
| 7524177 | Pipe molding system with vacuum and temperature controls of cooling plugs | Stefan A. Lupke | 2009-04-28 |
| 7517209 | Molding apparatus with mold blocks having profiled face adjustment | Stefan A. Lupke | 2009-04-14 |
| 7311509 | Externally cooled moving mold | Stefan A. Lupke | 2007-12-25 |
| 7267535 | Pipe molding apparatus with mold tunnel air turbulence | Stefan A. Lupke | 2007-09-11 |
| 7264457 | Flow distributor for die tooling of pipe mold equipment with remote extruder | Stefan A. Lupke | 2007-09-04 |
| 7104777 | Pipe mold with compensation for pipe shrinkage | Stefan A. Lupke | 2006-09-12 |
| 7013778 | Tube cutting device | Stefan A. Lupke | 2006-03-21 |
| 6905325 | Pipe mold with compensation for pipe shrinkage | Stefan A. Lupke | 2005-06-14 |
| 6877976 | Molding die for ribbed pipe | Stefan A. Lupke | 2005-04-12 |
| 6644951 | Molding apparatus with mold block section transfer system | Stefan A. Lupke | 2003-11-11 |
| 6399002 | Method of making a pipe with coupling conforming to pipe diameter | Stefan A. Lupke | 2002-06-04 |
| 6372161 | Operation of a mold block with air flow control | Stefan A. Lupke | 2002-04-16 |
| 6352425 | Rotating disk extruder | Stefan A. Lupke | 2002-03-05 |