C02F 1/50
Treatment of water, waste water, or sewage: by addition or application of
Official title: by addition or application of a germicide or by oligodynamic treatment {(C02F1/4606, C02F1/467, C02F1/76 take precedence)}
C02F1/50 (Treatment of water, waste water, or sewage: by addition or application of) appears on 2,088 US grants and 2,023 published applications in this corpus.
Search patents in C02F- Granted patents
- 2,088
- Published applications
- 2,023
- Assignees
- 1,177
- Inventors
- 4,250
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 36 | 0 |
| 1977 | 31 | 0 |
| 1978 | 14 | 0 |
| 1979 | 8 | 0 |
| 1980 | 20 | 0 |
| 1981 | 21 | 0 |
| 1982 | 18 | 0 |
| 1983 | 9 | 0 |
| 1984 | 11 | 0 |
| 1985 | 18 | 0 |
| 1986 | 10 | 0 |
| 1987 | 16 | 0 |
| 1988 | 29 | 0 |
| 1989 | 29 | 0 |
| 1990 | 48 | 0 |
| 1991 | 60 | 0 |
| 1992 | 39 | 0 |
| 1993 | 32 | 0 |
| 1994 | 27 | 0 |
| 1995 | 39 | 0 |
| 1996 | 35 | 0 |
| 1997 | 50 | 0 |
| 1998 | 42 | 0 |
| 1999 | 52 | 0 |
| 2000 | 50 | 0 |
| 2001 | 50 | 16 |
| 2002 | 50 | 56 |
| 2003 | 50 | 78 |
| 2004 | 42 | 76 |
| 2005 | 39 | 86 |
| 2006 | 56 | 66 |
| 2007 | 43 | 81 |
| 2008 | 47 | 81 |
| 2009 | 38 | 74 |
| 2010 | 38 | 82 |
| 2011 | 32 | 67 |
| 2012 | 24 | 69 |
| 2013 | 44 | 75 |
| 2014 | 48 | 106 |
| 2015 | 67 | 90 |
| 2016 | 63 | 103 |
| 2017 | 56 | 76 |
| 2018 | 70 | 102 |
| 2019 | 60 | 103 |
| 2020 | 82 | 100 |
| 2021 | 84 | 102 |
| 2022 | 57 | 91 |
| 2023 | 52 | 70 |
| 2024 | 55 | 72 |
| 2025 | 67 | 63 |
| 2026 | 30 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus and method for disinfecting fluids29 Sep 2026US 12,747,169 B2Hiigenz LLC
- Ultrasonic scaler having an ozonated water system8 Sep 2026US 12,729,141 B2DENTSPLY SIRONA Inc.
- Systems, methods, and compounds for sustainable wastewater treatment and co-products thereof8 Sep 2026US 12,729,144 B2
- Dispenser25 Aug 2026US 12,714,955 B2King Technology, Inc.
- Satchel dispenser with an isolated dispersant chamber11 Aug 2026US 12,703,651 B2King Technology, Inc.
- Methods to reduce contamination, biofilm, and fouling from water systems and surfaces24 Sep 2026US 2026/0285716 A1Aequor, Inc.
- Method for treating water using nanobubbles and biocide in the production of wood pulp, paper, and cardboard24 Sep 2026US 2026/0285719 A1Hinacolsa, S.L.
- Wastewater treatment system and method of treating wastewater24 Sep 2026US 2026/0285727 A1Pegras Asia Pacific Pty Ltd
- Field-deployable antimicrobial product assemblies for air and water purification and treatment27 Aug 2026US 2026/0248137 A1Kavach Nanotechnologies Inc.
- Improved biocide compositions13 Aug 2026US 2026/0231947 A1Solugen, Inc.
Most cited
By later US patents
- Electro-optical instruments and methods for treating disease383US 5,993,378 A1999
- Anti-microbial quaternary ammonium co-polymers206US 4,026,945 AMillmaster Onyx Corporation · 1977
- Microbiocidal polymeric quaternary ammonium compounds200US 4,005,193 AMillmaster Onyx Corporation · 1977
- Anti-microbial quaternary ammonium co-polymers199US 4,025,617 AMillmaster Onyx Corporation · 1977
- Microbiocidal polymeric quaternary ammonium compounds197US 4,025,627 AMillmaster Onyx Corporation · 1977