Y10S 423/01
Waste acid containing iron
Y10S423/01 (Waste acid containing iron) appears on 128 US grants and 21 published applications in this corpus.
Search patents in Y10S- Granted patents
- 128
- Published applications
- 21
- Assignees
- 99
- Inventors
- 258
- Latest grant
- 6 Dec 2011
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 8 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 6 | 1 |
| 2002 | 5 | 3 |
| 2003 | 2 | 2 |
| 2004 | 4 | 5 |
| 2005 | 2 | 2 |
| 2006 | 5 | 2 |
| 2007 | 1 | 2 |
| 2008 | 3 | 2 |
| 2009 | 3 | 0 |
| 2010 | 1 | 2 |
| 2011 | 3 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Processes for making stable ferric chloride solutions6 Dec 2011US 8,071,067 B2Kemira Water Solutions, Inc.
- Apparatus for purifying air and purifying method thereof14 Jun 2011US 7,959,884 B2Samsung Electronics Co., Ltd.
- Method for processing an etching mixture which is formed during the production of highly pure silicon12 Apr 2011US 7,922,876 B2Wacker Chemie AG
- Method for recycling waste sulfuric acid23 Mar 2010US 7,682,066 B2Sony Corporation
- Process and apparatus for the recovery of metal oxide particles6 Oct 2009US 7,597,873 B2Andritz Inc.
- Processes For Making Stable Ferric Chloride Solutions2 Dec 2010US 2010/0301255 A1Kemira Chemicals, Inc.
- Apparatus for purifying air and purifying method thereof24 Jun 2010US 2010/0158778 A1Samsung Electronics Co., Ltd.
- Method for processing an etching mixture which is formed during the production of highly pure silicon6 Mar 2008US 2008/0053815 A1Wacker Chemie AG
- Process for recycling waste acid6 Mar 2008US 2008/0056982 A1Veolia ES Technical Solutions L.L.C.
- Method for processing iron-laden spent sulfuric acid31 May 2007US 2007/0122336 A1Tronax Pigments GMbH
Most cited
By later US patents
- Method of extracting heavy metals from industrial waste waters51US 3,931,007 ANippon Electric Co., Ltd. · 1976
- Process of preparing a preferred ferric sulfate solution, and product39US 4,707,349 A1987
- Fertilizer values from galvanizer waste27US 4,792,349 ATennessee Valley Authority · 1988
- Method of processing waste materials24US 4,741,776 ABlue Circle Industries Limited · 1988
- Process for producing iron oxide products from waste liquids containing ferrous salts22US 3,970,738 AToda Kogyo Corporation · 1976