Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8759476 | Method for producing polyamides | Philippe Desbois, Hagen Stawitzki, Ralf Neuhaus, Hans-Joachim Weis, Jurgen Weichmann +1 more | 2014-06-24 |
| 4772327 | Easy-working spray concrete | Kurt Allemann, Klaus Deneke, Hansjurgen Hass | 1988-09-20 |
| 4609487 | Gel-forming mixture based on an alkali silicate and a trialkoxysilane | Rudolf Burkhardt, Hansjurgen Hass, Horst Hanisch | 1986-09-02 |
| 4504315 | Liquid accelerator for the setting of concrete mixtures | Kurt Allemann, Klaus Deneke, Hansjurgen Hass | 1985-03-12 |
| 4247024 | Aerosol container valve with means for tapping additional gas | — | 1981-01-27 |