C02F 2201/4613
Inversing polarity
C02F2201/4613 (Inversing polarity) appears on 410 US grants and 472 published applications in this corpus.
Search patents in C02F- Granted patents
- 410
- Published applications
- 472
- Assignees
- 310
- Inventors
- 1,027
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 7 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 11 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 7 | 0 |
| 1999 | 9 | 0 |
| 2000 | 10 | 0 |
| 2001 | 16 | 1 |
| 2002 | 10 | 10 |
| 2003 | 12 | 20 |
| 2004 | 8 | 17 |
| 2005 | 9 | 18 |
| 2006 | 6 | 14 |
| 2007 | 7 | 17 |
| 2008 | 7 | 15 |
| 2009 | 7 | 24 |
| 2010 | 7 | 13 |
| 2011 | 9 | 30 |
| 2012 | 15 | 18 |
| 2013 | 26 | 29 |
| 2014 | 16 | 20 |
| 2015 | 14 | 23 |
| 2016 | 13 | 18 |
| 2017 | 12 | 16 |
| 2018 | 9 | 22 |
| 2019 | 22 | 10 |
| 2020 | 12 | 25 |
| 2021 | 11 | 26 |
| 2022 | 12 | 21 |
| 2023 | 14 | 19 |
| 2024 | 11 | 18 |
| 2025 | 14 | 16 |
| 2026 | 10 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Electrodeionization apparatus202US 4,632,745 AMillipore Corporation · 1986
- Water treatment system for swimming pools and potable water151US 4,752,401 ASafe Water Systems International, Inc. · 1988
- Electrodeionization polarity reversal apparatus and process105US 5,026,465 AIonics, Incorporated · 1991
- Strong acid sterilizing liquid containing hypochlorous acid at a low concentration, method and apparatus for generating same, and apparatus for generating and dispensing same104US 5,858,201 AToto Ltd. · 1999
- Gas diffusion anode and CO2 cathode electrolyte system100US 7,993,500 B2Calera Corporation · 2011