C01B 17/585
From ammonium sulfate containing sulfuric acid solutions
Official title: {from ammonium sulfate containing sulfuric acid solutions}
C01B17/585 (From ammonium sulfate containing sulfuric acid solutions) appears on 4 US grants and 0 published applications in this corpus.
Search patents in C01B- Granted patents
- 4
- Published applications
- 0
- Assignees
- 4
- Inventors
- 12
- Latest grant
- 21 Apr 2009
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for regenerating a residual substance that contains sulfur and an atomizing burner suited for carrying out said method21 Apr 2009US 7,521,035 B1Messer Griesheim GmbH
- Method for recovering sulfuric acid from sulfate salts14 Nov 2000US 6,146,612 ADegussa-Huls AG
- Regeneration of sulfuric acid from sulfate by-products of 2-hydoxy-4-(methylthio) butyric acid manufacture23 Sep 1997US 5,670,128 ANovus International, Inc.
- Regeneration of sulfuric acid from sulfate by-products of 2-hydroxy-4-(methylthio)butyric acid manufacture12 Mar 1996US 5,498,790 ANovus International, Inc.
No published applications in this class yet.
Most cited
By later US patents
- Regeneration of sulfuric acid from sulfate by-products of 2-hydroxy-4-(methylthio)butyric acid manufacture11US 5,498,790 ANovus International, Inc. · 1996
- Method for regenerating a residual substance that contains sulfur and an atomizing burner suited for carrying out said method5US 7,521,035 B1Messer Griesheim GmbH · 2009