B01D 33/275
Using contiguous impervious surfaces
Official title: {using contiguous impervious surfaces}
B01D33/275 (Using contiguous impervious surfaces) appears on 93 US grants and 33 published applications in this corpus.
Search patents in B01D- Granted patents
- 93
- Published applications
- 33
- Assignees
- 52
- Inventors
- 112
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 6 | 0 |
| 2000 | 5 | 0 |
| 2001 | 7 | 1 |
| 2002 | 4 | 2 |
| 2003 | 4 | 2 |
| 2004 | 1 | 0 |
| 2005 | 1 | 2 |
| 2006 | 2 | 1 |
| 2007 | 0 | 3 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 4 |
| 2012 | 0 | 2 |
| 2013 | 2 | 1 |
| 2014 | 3 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 3 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 1 | 2 |
| 2021 | 1 | 2 |
| 2022 | 2 | 3 |
| 2023 | 2 | 0 |
| 2024 | 1 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Sand and solids bypass separator14 Jul 2026US 12,680,439 B2
- Screen cylinder22 Oct 2024US 12,123,141 B2Aikawa Fiber Technologies Oy
- Screen cylinder19 Dec 2023US 11,846,070 B2Aikawa Fiber Technologies Oy
- Sand and solids bypass separator3 Oct 2023US 11,773,708 B2WellWorx Energy Solutions LLC
- Sand and solids bypass separator11 Oct 2022US 11,466,553 B2WellWorx Energy Solutions LLC
- Screen cylinder8 Feb 2024US 2024/0044077 A1Aikawa Fiber Technologies Oy
- Sand and Solids Bypass Separator18 Jan 2024US 2024/0018862 A1
- Sand and Solids Bypass Separator2 Jun 2022US 2022/0170358 A1WellWorx Energy Solutions LLC
- Sand and Solids Bypass Separator31 Mar 2022US 2022/0098966 A1WellWorx Energy Solutions LLC
- Slit spiral tube for self-cleaning pressure filters and a slot self-cleaning pressure filter with such a slit tube20 Jan 2022US 2022/0016552 A1
Most cited
By later US patents
- Conical screen basket centrifuge53US 5,378,364 ABaker Hughes Incorporated · 1995
- Single pass mud rejuvenation system and method50US 4,639,258 A1987
- Separation of solids from liquids by screening47US 4,236,999 AContra-Shear Holdings Limited · 1980
- Double drum waste water screen34US 5,433,849 ALyco Manufacturing, Inc. · 1995
- Waste materials filtering apparatus28US 4,597,864 A1986