C02F 3/226
"deep shaft" processes
Official title: {"Deep shaft" processes}
C02F3/226 ("deep shaft" processes) appears on 89 US grants and 28 published applications in this corpus.
Search patents in C02F- Granted patents
- 89
- Published applications
- 28
- Assignees
- 39
- Inventors
- 94
- Latest grant
- 17 Oct 2017
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 12 | 0 |
| 1982 | 4 | 0 |
| 1983 | 9 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 7 | 1 |
| 2002 | 4 | 7 |
| 2003 | 2 | 1 |
| 2004 | 2 | 2 |
| 2005 | 1 | 3 |
| 2006 | 2 | 3 |
| 2007 | 2 | 2 |
| 2008 | 2 | 3 |
| 2009 | 2 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Systems and methods for waste treatment17 Oct 2017US 9,790,112 B2Aquanos Energy Ltd.
- Sewage silo with centripetal action discharge arm27 Jan 2015US 8,939,329 B2RDP Technologies, Inc.
- Microporous diffusion apparatus12 Jan 2010US 7,645,380 B2ThinkVillage-Kerfoot, LLC
- Liquid aeration system and method18 Aug 2009US 7,575,226 B2Allied Precision Industries, Inc.
- Microporous diffusion apparatus26 May 2009US 7,537,706 B2ThinkVillage-Kerfoot, LLC
- Systems and methods for waste treatment9 Jul 2015US 2015/0191382 A1Aquanos Energy Ltd.
- Sewage water depuration plant, comprising a vertical reactor, with improved nitrogen treatment3 Jul 2014US 2014/0183108 A1H.C. Development S.R.L.
- Systems and methods for waste treatment13 Feb 2014US 2014/0042085 A1Aquanos Energy Ltd.
- Sewage Silo With Centripetal Action Discharge Arm6 Dec 2012US 2012/0308349 A1RDP Technologies, Inc.
- Method and apparatus for aeration28 Apr 2011US 2011/0096618 A1
Most cited
By later US patents
- Equipment for gassing a liquid and process for operating the equipment80US 4,507,253 ABBC Brown, Boveri & Company, Limited · 1985
- Zero waste effluent desalination system66US 5,520,816 A1996
- Zero waste effluent water desalination system64US 6,103,125 A2000
- Microporous diffusion apparatus62US 5,855,775 A1999
- Apparatus for biological treatment of waste waters61US 7,018,530 B22006