Issued Patents All Time
Showing 26–50 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5236682 | Process for producing crystalline sodium silicates having a layered structure | Michael Kotzian, Herbert Panter, Alexander Tapper | 1993-08-17 |
| 5229095 | Process for producing amorphous sodium silicate | Michael Kotzian, Herbert Panter, Alexander Tapper | 1993-07-20 |
| 5211930 | Process for the preparation of crystalline sodium silicates having a sheet structure | Reinhard Gradl, Martin Schott | 1993-05-18 |
| 5183651 | Process for the preparation of crystalline sodium silicates | Michael Kotzian, Reinhard Gradl | 1993-02-02 |
| 5158752 | Plant for producing ammonium polyphosphate | Thomas Staffel, Horst Buhl, Jurgen Grosse | 1992-10-27 |
| 5124137 | Process for the preparation of alkali metal phosphate solutions | Thomas Staffel, Reinhard Gradl | 1992-06-23 |
| 5078895 | Washing agent with storage-stabilized bleach system | Franz-Josef Dany, Werner Gohla, Hans-Peter Rieck, Ingrid Czeslik | 1992-01-07 |
| 4971778 | Process for working up phosphoric acid | Gerhard Bettermann, Jens Tiedemann | 1990-11-20 |
| 4906445 | Continuous process for complete removal or organic impurities from and complete decolorization of prepurified wet-process phosphoric acid | Gerhard Bettermann, Gero Heymer, Friedrich Kolkmann | 1990-03-06 |
| 4904459 | Process for working up dusts which are produced in the electrothermal production of phosphorus | Friedrich Kolkmann, Johannes Scheffer | 1990-02-27 |
| 4834960 | Process for purifying phosphorous acid | Jurgen Grosse, Bernhard Hofmann | 1989-05-30 |
| 4806324 | Process for making phosphoric acid free from titanium | Reinhard Gradl, Klaus Schrodter | 1989-02-21 |
| 4780294 | Process for making crude phosphoric acid | Friedrich Kolkmann, Reinhard Gradl, Herbert Ressel | 1988-10-25 |
| 4777025 | Process for making phosphorus pentoxide of diminished reactivity | Werner Kowalski, Theo Dahmen, Hans Haas | 1988-10-11 |
| 4774005 | Process for working-up an aqueous silicohydrofluoric acid solution | — | 1988-09-27 |
| 4762693 | Process for working up heavy metal-containing residues originally from the decontamination of crude phosphoric acid | Reinhard Gradl, Friedrich Kolkmann | 1988-08-09 |
| 4713229 | Process for purifying phosphoric acid | Reinhard Gradl | 1987-12-15 |
| 4705529 | Process for reducing the reactivity and improving the flow behavior of phosphorus pentoxide | Werner Kowalski, Gero Heymer, Reinhard Gradl | 1987-11-10 |
| 4683127 | Process for making wet-process phosphoric acid | Friedrich Kolkmann, Herbert Ressel, Reinhard Gradl | 1987-07-28 |
| 4640824 | Process for making alkali metal phosphate solutions containing little fluorine | Reinhard Gradl | 1987-02-03 |
| 4629614 | Process for decontaminating phosphoric acid | Reinhard Gradl | 1986-12-16 |
| 4620966 | Process for defluorinating alkali metal phosphate solutions | Herbert Ressel, Gero Heymer, Reinhard Gradl | 1986-11-04 |
| 4596703 | Process for purifying wet-processed phosphoric acid | Reinhard Gradi, Gero Heymer | 1986-06-24 |
| 4540558 | Process for removing organic contaminants from wet-processed phosphoric acid | Reinhard Gradl, Hans-Werner Stephan, Gero Heymer | 1985-09-10 |
| 4540557 | Process for reducing the fluorine content in wet-processed phosphoric acid | Reinhard Gradl | 1985-09-10 |