Issued Patents All Time
Showing 1–25 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6946524 | Methods for producing polyester amides based on polyisobutylenes, polyester amides produced thereby, and uses therefor in stabilizing crude oil | Wolfgang Breuer, Paul Birnbrich, Stephan von Tapavicza, Didier Groffe, Matthias Hof | 2005-09-20 |
| 6806235 | Lubricants for drilling fluids | Heinz Mueller, Frank Bongardt, Nadja Herzog, Stephan von Tapavicza | 2004-10-19 |
| 6716799 | Use of selected fatty alcohols and their mixtures with carboxylic acid esters as lubricant components in water-based drilling fluid systems for soil exploration | Heinz Mueller, Stephan von Tapavicza | 2004-04-06 |
| 6596670 | Use of selected oleophilic ethers in water-based drilling fluids of the O/W emulsion type and corresponding drilling fluids with improved ecological acceptability | Heinz Mueller, Stephan von Tapavicza, Gerhard Stoll, Rainer Jeschke, Johann F. Fues | 2003-07-22 |
| 6368422 | Process for removing solid asphalt residues produced in the petroleum industry | Wolfgang Breuer | 2002-04-09 |
| 6350788 | Low-foam surfactant concentrates for use in the domain of plant growth stimulation | Stephan von Tapavicza, Heinz Mueller, Heinz Boettcher | 2002-02-26 |
| 6344431 | Use of selected inhibitors against the formation of solid organo-based incrustations from fluid hydrocarbon mixtures | Stephan von Tapavicza, Wolfgang Zoellner, Jacques Groffe, Jean-Michel Rouet | 2002-02-05 |
| 6310106 | Method for demulsifying emulsions | Stefan Podubrin, Wolfgang Breuer, Andreas Heidbreder, Thomas Foerster, Martina Hollenbrock | 2001-10-30 |
| 6289989 | Use of biodegradable alcoxylation products for cleaning boreholes, boring instruments or borings | Heinz Mueller, Berthold Schreck, Stefan Podubrin, Andreas Heidbreder | 2001-09-18 |
| 6261346 | Method for protecting metal surfaces against corrosion in liquid or gaseous media | Wolfgang Breuer, Robert W. Schuetz, Guenther Uphues, Rafael Pi | 2001-07-17 |
| 6211119 | Multiphase lubricant concentrates for use in water based systems in the field of exploratory soil drilling | Heinz Mueller, Thomas Foerster, Stephan von Tapavicza, Marcus Claas | 2001-04-03 |
| 6180572 | Aqueous swellable compositions of guar gum and guar gum derivatives in oleophilic liquids and their use | Heinz Mueller, Stephan von Tapavicza | 2001-01-30 |
| 6165946 | Process for the facilitated waste disposal of working substances based on water-in-oil invert emulsions | Heinz Mueller, Thomas Foerster, Stephan von Tapavicza, Johann F. Fues | 2000-12-26 |
| 6122860 | Method of boosting surface consolidation of soil threatened by erosion | Stefan Von Tapavicza, Heinz Mueller, Heinz Boettcher, Frank Burbach | 2000-09-26 |
| 6022833 | Multicomponent mixtures for use in geological exploration | Heinz Mueller, Thomas Foerster, Stephan von Tapavicza, Johann F. Fues, Marcus Claas | 2000-02-08 |
| 5869434 | Free-flowing borehole servicing preparations containing linear .alpha.-olefins, more patricularly corresponding drilling fluids | Heinz Mueller, Matthias Fies, Stephan von Tapavicza | 1999-02-09 |
| RE36066 | Use of selected ester oils in drilling fluids and muds | Heinz Mueller, Stephan von Tapavicza, Douglas J. Grimes, Jean-Marc Braun, Stuart Paul Smith | 1999-01-26 |
| 5755892 | Waste disposal of contaminated drill cuttings from geological drilling using drilling fluid systems containing mineral oil | Heinz Mueller, Stephan von Tapavizca, Malcolm Ellice, Douglas J. Grimes | 1998-05-26 |
| 5663122 | Mineral additives for setting and/or controlling the rheological properties and gel structure of aqueous liquid phases and the use of such additives | Heinz Mueller, Wolfgang Breuer, Peter Kuhm, Stephan von Tapavicza | 1997-09-02 |
| 5508258 | Use of surface-active alpha-sulfo-fatty acid di-salts in water and oil based drilling fluids and other drill-hole treatment agents | Heinz Mueller, Johann F. Fues | 1996-04-16 |
| 5461028 | Fluid-drill-hole treatment agents based on carbonic acid diesters | Heinz Mueller, Alfred Westfechtel, Stephan von Tapavicza | 1995-10-24 |
| 5441927 | Fluid drill-hole treatment agents based on polycarboxylic acid diesters | Heinz Mueller, Stephan von Tapavicza, Johann F. Fues | 1995-08-15 |
| 5421907 | Process for cold cleaning oil-contaminated metal surfaces with 2-ethylhexyl esters of fatty acids | Claus Nieendick, Karl Schmid, Heinz Mueller | 1995-06-06 |
| 5418278 | Aqueous emulsion copolymers, more especially in water-and oil-dilutable form, for improving the flow properties and pour point depression of crude oils and petroleum fractions and their use | Wolfgang Ritter | 1995-05-23 |
| 5403822 | Esters of carboxylic acids of medium chain-length as a component of the oil phase in invert drilling muds | Heinz Mueller, Stephan von Tapavicza, Michael Neuss, Wolfgang Zoellner, Frank Burbach | 1995-04-04 |