Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9328022 | Copolymer for dispersant for cement, dispersant for cement, and cement composition | Tsuyoshi Hirata, Alex Lange | 2016-05-03 |
| 8470907 | Additive for cementing wells | Roland Reichenbach-Klinke, Tinton Setiawan | 2013-06-25 |
| 8124670 | Water-soluble and biodegradable copolymers on a polyamide basis and use thereof | Martin Matzinger, Roland Reichenbach-Klinke, Gregor Keilhofer, Christian Spindler | 2012-02-28 |
| 7612150 | Polyamide-based water-soluble biodegradable copolymers and the use thereof | Christian Spindler | 2009-11-03 |
| 7576039 | Additive for drilling fluids | Johann Huber, Jurgen Heidlas, Gregor Keilhofer, Peter M. Lange | 2009-08-18 |
| 7202319 | Water-soluble copolymers based on olefinic sulfonic acids, method for the production thereof and use of the same | Christian Spindler, Andrea Fenchl, Uwe Huber | 2007-04-10 |
| 6995105 | Use of water-soluble mixed polymers as a flowing medium and/or as a hardening retarder for refractory materials which contain aluminate cement | Steffen Wache, Konrad Wutz, Manfred Bichler | 2006-02-07 |
| 6953090 | Cementing subterranean zones using cement compositions containing biodegradable dispersants | Jan Pieter Vijn, Christian Spindler, Gregor Keilhofer | 2005-10-11 |
| 6864344 | Sulfonated condensation products which are stabile in storage, method for the production thereof, and their use | Uwe Holland, Martin Matzinger | 2005-03-08 |
| 6608159 | Polymeric, acrylamide-free water retention agent | Andrea Fenchl | 2003-08-19 |
| 6475959 | Method for the rheology control of fluid phases | Peter M. Lange, Gregor Keilhofer | 2002-11-05 |
| 6346588 | Terpolymers based on sulfobetaines, processes for their preparation and their use as thickeners for aqueous salt solutions | Andrea Fenchl, Michael Schinabeck | 2002-02-12 |
| 6025303 | Solids composition based on clay minerals and use thereof | Gregor Keilhofer | 2000-02-15 |
| 5705599 | Graft polymers of ketone-aldehyde condensation and co-condensation products | Josef Felixberger | 1998-01-06 |
| 5504061 | Drilling fluid composition and process for the filtrate reduction of drilling fluid compositions containing mixed metal hydroxides | — | 1996-04-02 |
| 5035812 | Thermostable polymers | Alois Aignesberger, Josef Weichmann, Manfred Bichler | 1991-07-30 |
| 4818288 | Dispersant for concrete mixtures of high salt content | Alois Aignesberger | 1989-04-04 |
| 4666979 | Metal compounds of acid group-containing condensation products and co-condensation products of ketones and aldehydes | Alois Aignesberger | 1987-05-19 |
| 4657593 | Modifying surface tension of finely-divided materials in a liquid | Alois Aignesberger | 1987-04-14 |
| 4585853 | Acid group-containing hydrophilic co-condensation products of ketone-aldehyde resins | Alois Aignesberger | 1986-04-29 |