Issued Patents All Time
Showing 1–25 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5211930 | Process for the preparation of crystalline sodium silicates having a sheet structure | Gunther Schimmel, Martin Schott | 1993-05-18 |
| 5183651 | Process for the preparation of crystalline sodium silicates | Gunther Schimmel, Michael Kotzian | 1993-02-02 |
| 5165904 | Process for producing ammonium polyphosphate | Thomas Staffel, Wolfgang Becker, Gregor Fucker | 1992-11-24 |
| 5166452 | Process for inhibiting and destroying peroxides in dialkyl ethers | Heinz Erpenbach, Norbert Weferling, Erhard Jagers | 1992-11-24 |
| 5124137 | Process for the preparation of alkali metal phosphate solutions | Gunther Schimmel, Thomas Staffel | 1992-06-23 |
| 5124290 | Process for removing metallic corrosion products from carbonylation reactions carried out under anhydrous conditions | Heinz Erpenbach, Erhard Jagers, Andreas Seidel, Peter Prinz | 1992-06-23 |
| 5066365 | Process for the isolation of vinyl acetate by distillation | Gunter Roscher, Karl-Heinz Schmidt, Klaus Eichler, Peter Horstermann, Horst Langner | 1991-11-19 |
| 4806324 | Process for making phosphoric acid free from titanium | Gunther Schimmel, Klaus Schrodter | 1989-02-21 |
| 4780294 | Process for making crude phosphoric acid | Gunther Schimmel, Friedrich Kolkmann, Herbert Ressel | 1988-10-25 |
| 4762693 | Process for working up heavy metal-containing residues originally from the decontamination of crude phosphoric acid | Gunther Schimmel, Friedrich Kolkmann | 1988-08-09 |
| 4713229 | Process for purifying phosphoric acid | Gunther Schimmel | 1987-12-15 |
| 4705529 | Process for reducing the reactivity and improving the flow behavior of phosphorus pentoxide | Gunther Schimmel, Werner Kowalski, Gero Heymer | 1987-11-10 |
| 4683127 | Process for making wet-process phosphoric acid | Friedrich Kolkmann, Herbert Ressel, Gunther Schimmel | 1987-07-28 |
| 4678650 | Process for making an alkali phosphate solution | Gero Heymer | 1987-07-07 |
| 4668492 | Process for dearsenifying phosphoric acid solutions | G/u/ nther Schimmel, Gero Heymer | 1987-05-26 |
| 4640824 | Process for making alkali metal phosphate solutions containing little fluorine | Gunther Schimmel | 1987-02-03 |
| 4629614 | Process for decontaminating phosphoric acid | Gunther Schimmel | 1986-12-16 |
| 4620966 | Process for defluorinating alkali metal phosphate solutions | Gunther Schimmel, Herbert Ressel, Gero Heymer | 1986-11-04 |
| 4556548 | Process for purifying wet-processed phosphoric acid | Hilmar Roszinski | 1985-12-03 |
| 4540557 | Process for reducing the fluorine content in wet-processed phosphoric acid | Gunther Schimmel | 1985-09-10 |
| 4540558 | Process for removing organic contaminants from wet-processed phosphoric acid | Hans-Werner Stephan, Gero Heymer, Gunther Schimmel | 1985-09-10 |
| 4539192 | Process for removing fluorine and organic compounds from prepurified wet processed phosphoric acid | Gunther Schimmel, Gero Heymer | 1985-09-03 |
| 4503016 | Process for extracting heavy metal ions from aqueous solutions | G/u/ nther Schimmel, Werner Krause | 1985-03-05 |
| 4479924 | Process for the separation of heavy metal compounds from phosphoric acid | Helmold von Plessen, G/u/ nther Schimmel | 1984-10-30 |
| 4466948 | Process for removing heavy metal ions and arsenic from wet-processed phosphoric acid | Gunther Schimmel, Gero Heymer | 1984-08-21 |