B03D 1/245
Injecting gas through perforated or porous area
Official title: {Injecting gas through perforated or porous area}
B03D1/245 (Injecting gas through perforated or porous area) appears on 95 US grants and 38 published applications in this corpus.
Search patents in B03D- Granted patents
- 95
- Published applications
- 38
- Assignees
- 73
- Inventors
- 179
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 5 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 4 |
| 2012 | 1 | 2 |
| 2013 | 2 | 2 |
| 2014 | 1 | 0 |
| 2015 | 2 | 2 |
| 2016 | 2 | 4 |
| 2017 | 0 | 0 |
| 2018 | 2 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 3 |
| 2021 | 5 | 5 |
| 2022 | 1 | 4 |
| 2023 | 1 | 3 |
| 2024 | 3 | 2 |
| 2025 | 2 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Headrace system13 Jan 2026US 12,522,518 B2Utsunomiya Kogyo Co., Ltd.
- Separator apparatus and feed arrangement for increased capacity4 Nov 2025US 12,458,980 B2FLSmidth A/S
- Method of acylating amino acids and uses of N-acyl amino acid products7 Jan 2025US 12,187,624 B2NewSouth Innovations Pty Limited
- Method for separating low density particles from feed slurries14 May 2024US 11,981,584 B2Newcastle Innovation Limited
- Separation device and method to separate contaminants from contaminated water19 Mar 2024US 11,931,677 B2Hydra Water AB
- Method and apparatus for treating water containing per- and polyfluoroalkyl substances (pfas)12 Jun 2025US 2025/0187943 A1Ultraaqua A/S
- Slurry feeding arrangement16 Jan 2025US 2025/0018404 A1Metso Finland Oy
- Apparatus and method for reagentizing and aerating feed to flotation machines14 Nov 2024US 2024/0375122 A1FLSmidth A/S
- Membrane spargers for gravity separators and flotation machines14 Nov 2024US 2024/0375123 A1FLSmidth A/S
- Compressed air jetting mechanism, and conduit and sedimentation basin using the same3 Aug 2023US 2023/0243144 A1Utsunomiya Kogyo Co., Ltd.
Most cited
By later US patents
- Process and apparatus for separating fine particles by microbubble flotation together with a process and apparatus for generation of microbubbles82US 4,981,582 AVirginia Tech Intellectual Properties, Inc. · 1991
- Oil concentrator57US 4,422,931 A1983
- Method of separating carbonaceous components from particulate coal containing inorganic solids and apparatus therefor51US 4,998,624 ACanadian Patents and Development Limited · 1991
- Aeration/flotation reactor46US 4,834,872 AKFA Juelich · 1989
- Oil and water separating system with hydrocyclone and floatation device42US 5,021,165 AConoco Specialty Products Inc. · 1991