B01F 23/231261
Having a box- or block-shape, being in the form of aeration stones
Official title: {having a box- or block-shape, being in the form of aeration stones}
B01F23/231261 (Having a box- or block-shape, being in the form of aeration stones) appears on 31 US grants and 12 published applications in this corpus.
Search patents in B01F- Granted patents
- 31
- Published applications
- 12
- Assignees
- 22
- Inventors
- 50
- Latest grant
- 7 May 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 1 |
| 2013 | 2 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Aerator device, filter system including an aerator device, and method of aerating a filter using an aerator device10 Nov 2020US 10,828,607 B2Lotte Chemical Corporation
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- Method And Apparatus For Separation Of A Substance From Groundwater29 Aug 2019US 2019/0263679 A1OPEC Remediation Technologies Pty Limited
- Method And Apparatus For Separation Of A Substance From Groundwater13 Jun 2019US 2019/0176101 A1OPEC Remediation Technologies Pty Limited
- Gas diffusion system and method for introducing a gas stream in an apparatus, in particular a passivating gas stream in a urea plant23 Jun 2016US 2016/0175795 A1Saipem S.P.A.
Most cited
By later US patents
- Apparatus for aerating and mixing waste water49US 4,563,277 AEnvironmental Dynamics, Inc. · 1986
- Diffusion device45US 5,015,421 AParkson Corporation · 1991
- Water charging machine42US 5,925,292 AAqua Life Corporation · 1999
- Sparger36US 3,978,176 AMinnesota Mining and Manufacturing Company · 1976
- Apparatus for aerating and mixing waste water36US 4,842,732 A1989