C01B 17/504
Of ammonium sulfates
Official title: {of ammonium sulfates (of ammonium sulfates containing sulfuric acid solutions C01B17/585)}
C01B17/504 (Of ammonium sulfates) appears on 7 US grants and 0 published applications in this corpus.
Search patents in C01B- Granted patents
- 7
- Published applications
- 0
- Assignees
- 7
- Inventors
- 11
- Latest grant
- 8 Apr 2014
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 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 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Solar metal sulfate-ammonia based thermochemical water splitting cycle for hydrogen production8 Apr 2014US 8,691,068 B1University of Central Florida Research Foundation, Inc.
- Process for producing ammonia and sulfur dioxide5 Feb 1991US 4,990,319 AJgc Corporation
- Catalytic conversion of an ammonium sulfate to sulfur dioxide and ammonia28 Mar 1978US 4,081,515 AInstitut Francais du Petrole
- Process for the manufacture of lactams18 Oct 1977US 4,054,562 ADavy Powergas GmbH
- Process for the manufacture of lactams20 Sep 1977US 4,049,646 ADavy Powergas GmbH
No published applications in this class yet.
Most cited
By later US patents
- Process for the manufacture of lactams6US 4,049,646 ADavy Powergas GmbH · 1977
- Process for the manufacture of lactams6US 4,054,562 ADavy Powergas GmbH · 1977
- Catalytic conversion of an ammonium sulfate to sulfur dioxide and ammonia4US 4,081,515 AInstitut Francais du Petrole · 1978
- Sulfur dioxide from by-product ammonium sulfate solutions3US 3,944,657 ADavy Powergas GmbH · 1976
- Process for reducing molten ammonium sulfates containing metallic impurities to ammonia and sulfur dioxide2US 4,029,745 AInstitut Francais du Petrole des Carburants et Lubricants et Enterprise de Recherches et d'Activities Petroliers Elf · 1977