C02F 2301/026
Spiral, helicoidal, radial
C02F2301/026 (Spiral, helicoidal, radial) appears on 451 US grants and 615 published applications in this corpus.
Search patents in C02F- Granted patents
- 451
- Published applications
- 615
- Assignees
- 346
- Inventors
- 1,050
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 0 |
| 2002 | 5 | 3 |
| 2003 | 6 | 20 |
| 2004 | 11 | 23 |
| 2005 | 14 | 12 |
| 2006 | 12 | 58 |
| 2007 | 13 | 26 |
| 2008 | 8 | 24 |
| 2009 | 16 | 19 |
| 2010 | 14 | 24 |
| 2011 | 8 | 20 |
| 2012 | 13 | 17 |
| 2013 | 14 | 22 |
| 2014 | 20 | 20 |
| 2015 | 14 | 23 |
| 2016 | 14 | 22 |
| 2017 | 13 | 22 |
| 2018 | 17 | 28 |
| 2019 | 22 | 37 |
| 2020 | 34 | 35 |
| 2021 | 30 | 38 |
| 2022 | 22 | 29 |
| 2023 | 23 | 27 |
| 2024 | 26 | 28 |
| 2025 | 16 | 27 |
| 2026 | 13 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pool skimmer6 Oct 2026US 12,753,619 B1Sichuan Cootway Technology Co., Ltd.
- Method and apparatus for water processing29 Sep 2026US 12,746,520 B2
- Oil-water mixture treatment device and method15 Sep 2026US 12,735,334 B2China Petroleum & Chemical Corporation
- Pool skimmer1 Sep 2026US 12,723,423 B1Sichuan Cootway Technology Co., Ltd.
- Flocculation cyclone device, marine plastic removal system using the same, ship provided with the system, and operation method for the ship16 Jun 2026US 12,654,179 B2Ambitious Technologies, LTD.
- Assembly providing gravity fed or pump fed curvilinear motion for polymer release and mixing, including centrally mounting multi-outlet nozzle, overflow rim discharge system, and method for passive stormwater treatment using controlled rotational flow17 Sep 2026US 2026/0274719 A1
- A uv-germicidal irradiation system for germicidal treatment of liquids23 Jul 2026US 2026/0209081 A1Lyras DK ApS
- A space optimized ultra violet germicidal irradiation system23 Jul 2026US 2026/0209082 A1Lyras DK ApS
- System and method of purification and separation of solids in liquids by means of aqueous films21 May 2026US 2026/0138893 A1
- Assembly to provide gravity fed curvilinear motion for polymer release and mixing21 May 2026US 2026/0138900 A1
Most cited
By later US patents
- Method and apparatus for treating cooling tower water124US 4,764,283 A1988
- Ozone/ultraviolet water purification111US 4,230,571 A1980
- Disinfection and purification of fluids using focused laser radiation102US 4,265,747 ASterling Drug Inc. · 1981
- Filter retainer for water purification unit96US 5,540,848 AVortex Corporation · 1996
- Enhanced in-bottle filtration mechanism and techniques84US 6,136,189 AInnova Pure Water Inc. · 2000