B01D 29/48
Of spirally or helically wound bodies
Official title: of spirally or helically wound bodies
B01D29/48 (Of spirally or helically wound bodies) appears on 171 US grants and 100 published applications in this corpus.
Search patents in B01D- Granted patents
- 171
- Published applications
- 100
- Assignees
- 96
- Inventors
- 269
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 9 | 0 |
| 1982 | 1 | 0 |
| 1983 | 6 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 7 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 10 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 8 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 3 |
| 2003 | 0 | 2 |
| 2004 | 2 | 6 |
| 2005 | 2 | 4 |
| 2006 | 3 | 2 |
| 2007 | 3 | 8 |
| 2008 | 1 | 5 |
| 2009 | 2 | 7 |
| 2010 | 3 | 5 |
| 2011 | 7 | 2 |
| 2012 | 7 | 10 |
| 2013 | 3 | 10 |
| 2014 | 3 | 4 |
| 2015 | 4 | 4 |
| 2016 | 5 | 4 |
| 2017 | 3 | 2 |
| 2018 | 2 | 1 |
| 2019 | 4 | 3 |
| 2020 | 2 | 4 |
| 2021 | 3 | 6 |
| 2022 | 3 | 4 |
| 2023 | 3 | 1 |
| 2024 | 1 | 2 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Milking device including tube-shaped filter component13 Jan 2026US 12,520,812 B2Lely Patent N. V.
- Advanced passive wedge wire screen intake9 Dec 2025US 12,491,455 B2Johnson Screens, Inc.
- Screen intake flow control and support device16 Jan 2024US 11,873,612 B2Johnson Screens, Inc.
- System and method for a filter system19 Dec 2023US 11,845,020 B2Pentair Water Pool and Spa, Inc.
- Rag seeding in wastewater treatment systems25 Jul 2023US 11,707,704 B2Ovivo Inc.
- Hollow cylindrical filter, and manufacturing method17 Apr 2025US 2025/0121304 A1Fuji Filter Manufacturing Co., Ltd.
- Milking device3 Oct 2024US 2024/0324542 A1Lely Patent N. V.
- Milking device provided with a milk filter29 Aug 2024US 2024/0284864 A1Lely Patent N. V.
- Advanced passive wedge wire screen intake6 Apr 2023US 2023/0103787 A1Aqseptence Group, Inc.
- Multi-shaft laminated spiral solid-liquid separator30 Jun 2022US 2022/0203273 A1
Most cited
By later US patents
- Screen material61US 6,698,595 B2Weatherford/Lamb, Inc. · 2004
- Well screen with erosion protection walls47US 4,064,938 AStandard Oil Company (Indiana) · 1977
- High load self-cleaning helical spring filters46US 3,937,281 ATexaco Inc. · 1976
- Helical spring apparatus and process for detaching filter cake42US 4,804,481 ABoll & Kirch Filterbau GmbH · 1989
- Electro-coalescence/magnetic separation (ECMS) system and components for removal of contaminants from water streams, including desalinization42US 5,597,479 AAqua-Ion Systems, Inc. · 1997