Chemiebau Dr. A. Zieren GmbH & Co. KG
Patent Applications and Registrations
Patent applications and USPTO patent grants for Chemiebau Dr. A. Zieren GmbH & Co. KG.The latest application filed is for "low so.sub.2 emission sulfuric acid process form sulfur and oxygen".
- Chemiebau Dr. A. Zieren GmbH & Co. KG - Cologne-Mungersdorf DT
- Chemiebau Dr. A. Zieren GmbH & Co., KG - Cologne DT
| Patent | Date |
|---|---|
| Low SO.sub.2 emission sulfuric acid process form sulfur and oxygen Grant 3,907,979 - Jenniges September 23, 1 | 1975-09-23 |
| Process For The Preparation Of Sodium Carbonate Monohydrate From A Sodium Hydroxide Solution Produced According To The Diaphragm Process Grant 3,843,768 - Neumann October 22, 1 | 1974-10-22 |
| Apparatus For The Separation Of Organic Acid Anhydrides Grant 3,819,333 - Brand , et al. June 25, 1 | 1974-06-25 |
| Process For The Cracking Of Ammonium Sulfate Grant 3,761,575 - Furkert September 25, 1 | 1973-09-25 |
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