Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6569342 | Process for treating waters, soils, sediments and/or silts | Thomas Willuweit, Stefan Nowicki, Kai-Uwe Ulrich | 2003-05-27 |
| 5648067 | Cosmetic deodorant preparation containing di- or triglycerin esters | Helmut Dillenburg, Winfried Klein, Werner Siemanowski, Karlheinz Uhlig, Florian Wolf | 1997-07-15 |
| 5510542 | Process and apparatus for producing diglycerin | Werner Siemanowski | 1996-04-23 |
| 5466719 | Polyglycerol fatty acid ester mixture | Werner Siemanowski, Karl-Heinz Uhlig | 1995-11-14 |
| 5424469 | Process for preparing polyglycerol fatty acid ester mixtures and use in cosmetic, pharmeceutical and chemical preparations | Werner Siemanowski, Karl-Heinz Uhlig | 1995-06-13 |
| 5403941 | Preparation of fatty acid esters of isopropylidene derivatives of polyglycerol | Werner Siemanowski | 1995-04-04 |
| 5397497 | Bath additive composition containing polyglycerol fatty acid ester mixture | Werner Siemanowski, Karl-Heinz Uhlig | 1995-03-14 |
| 5264460 | Process for preparing nonionic surfactants | Werner Siemanowski, Karl-Heinz Uhlig | 1993-11-23 |
| 5247114 | Polyglycerine and capric acid ester mixture | Werner Siemanowski, Karlheinz Uhlig | 1993-09-21 |
| 5243086 | Process for the preparation of diglycerol and/or polyglycerol | Werner Siemanowski, Helmut Dillenburg | 1993-09-07 |
| 5169964 | Process for preparing high purity epichlorohydrin | Werner Siemanowski | 1992-12-08 |
| 5130056 | Cleaning agent and process for its preparation | Werner Siemanowski, Karl-Heinz Uhlig | 1992-07-14 |
| 5093043 | Process for preparing nonionic surfactants | Werner Siemanowski, Karl-Heinz Uhlig | 1992-03-03 |
| 5087708 | Method of preparing 2,2-dimethyl-4-(2',3'-epoxy) propoxymethyl-1,3-dioxolane and use thereof | Werner Siemanowski | 1992-02-11 |
| 5041688 | Process for the preparation of polyglycerols | Werner Siemanowski | 1991-08-20 |
| 5024787 | Process for the preparation of fatty acid or hydroxy fatty acid esters of isopropylidene derivatives of polyglycerols | Werner Siemanowski, Karl-Heinz Uhlig | 1991-06-18 |
| 4992594 | Process for the preparation of polyglycerols | Werner Siemanowski | 1991-02-12 |
| 4973763 | Process for the preparation of polyglycerols | Horst Linke, Werner Siemanowsky | 1990-11-27 |
| 4960953 | Process for preparing polyglycerols | Werner Siemanowski | 1990-10-02 |