C02F 1/5263
Using natural chemical compounds
Official title: {using natural chemical compounds}
C02F1/5263 (Using natural chemical compounds) appears on 238 US grants and 195 published applications in this corpus.
Search patents in C02F- Granted patents
- 238
- Published applications
- 195
- Assignees
- 187
- Inventors
- 554
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 7 | 0 |
| 1982 | 6 | 0 |
| 1983 | 10 | 0 |
| 1984 | 4 | 0 |
| 1985 | 7 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 9 | 0 |
| 1989 | 3 | 0 |
| 1990 | 7 | 0 |
| 1991 | 0 | 0 |
| 1992 | 5 | 0 |
| 1993 | 8 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 6 |
| 2004 | 7 | 6 |
| 2005 | 2 | 3 |
| 2006 | 2 | 8 |
| 2007 | 1 | 1 |
| 2008 | 2 | 3 |
| 2009 | 1 | 5 |
| 2010 | 4 | 1 |
| 2011 | 2 | 5 |
| 2012 | 2 | 5 |
| 2013 | 2 | 12 |
| 2014 | 5 | 18 |
| 2015 | 6 | 18 |
| 2016 | 3 | 9 |
| 2017 | 9 | 9 |
| 2018 | 13 | 12 |
| 2019 | 7 | 5 |
| 2020 | 10 | 14 |
| 2021 | 8 | 11 |
| 2022 | 7 | 11 |
| 2023 | 5 | 13 |
| 2024 | 10 | 6 |
| 2025 | 10 | 6 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Floculant formulation based on chitosan compatible with disinfection products and method of preparation8 Sep 2026US 12,729,142 B2Industrias Vepinsa, S.A. de C.V.
- Systems, methods, and compounds for sustainable wastewater treatment and co-products thereof8 Sep 2026US 12,729,144 B2
- Coagulating agent of plant origin for water treatment1 Sep 2026US 12,722,992 B2ServiecologíA Y Tratamiento De Aguas, S.L.
- Somatic embryonic cell suspension for wastewater treatment19 May 2026US 12,630,450 B1King Faisal University
- Method and arrangement for process water treatment17 Feb 2026US 12,551,903 B2Metso Finland Oy
- Coagulant compositions and methods of use6 Aug 2026US 2026/0225932 A1Locus Solutions Ipco, LLC
- Composition comprising charged polysaccharide and coagulant, and method of using the same23 Jul 2026US 2026/0209092 A1Paragon Solution Inc.
- Methods and biopolymer compositions for removing algae from pools and spa16 Jul 2026US 2026/0200771 A1Sani-Marc Inc.
- Coal-dust water flocculant using chitosan21 May 2026US 2026/0138899 A1Kittozite Co. Ltd.
- Apparatuses and methods for clarifying liquids9 Apr 2026US 2026/0097976 A1Clearflow Group Inc.
Most cited
By later US patents
- Method for treating process waste streams by use of natural flocculants51US 5,433,865 A1995
- Production of algal bio-polymers46US 3,958,364 AAmerican Bioculture, Inc. · 1976
- Treatment of tailings pond sludge39US 4,399,039 ASuncor, Inc. · 1983
- Flocculation of aqueous media with novel flocculating adjuvant37US 4,565,635 ARhone-Poulenc Specialites Chimiques · 1986
- Sludge treating process35US 4,053,401 ANichireki Chemical Inudstry Co., Ltd · 1977