C02F 1/683
By addition of complex-forming compounds
Official title: {by addition of complex-forming compounds}
C02F1/683 (By addition of complex-forming compounds) appears on 619 US grants and 672 published applications in this corpus.
Search patents in C02F- Granted patents
- 619
- Published applications
- 672
- Assignees
- 476
- Inventors
- 1,643
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 6 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 6 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 8 | 0 |
| 1993 | 8 | 0 |
| 1994 | 9 | 0 |
| 1995 | 4 | 0 |
| 1996 | 7 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 8 | 0 |
| 2000 | 11 | 0 |
| 2001 | 21 | 3 |
| 2002 | 14 | 18 |
| 2003 | 14 | 18 |
| 2004 | 15 | 20 |
| 2005 | 13 | 26 |
| 2006 | 13 | 25 |
| 2007 | 12 | 21 |
| 2008 | 15 | 21 |
| 2009 | 9 | 22 |
| 2010 | 16 | 25 |
| 2011 | 17 | 28 |
| 2012 | 13 | 35 |
| 2013 | 28 | 26 |
| 2014 | 27 | 36 |
| 2015 | 14 | 40 |
| 2016 | 28 | 28 |
| 2017 | 24 | 24 |
| 2018 | 24 | 26 |
| 2019 | 25 | 27 |
| 2020 | 29 | 27 |
| 2021 | 18 | 32 |
| 2022 | 22 | 30 |
| 2023 | 20 | 36 |
| 2024 | 29 | 31 |
| 2025 | 17 | 25 |
| 2026 | 19 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Enhanced foam fractionation of oil phase from aqueous/oil mixed phase via increased viscoelasticity8 Sep 2026US 12,729,140 B2Ecolab USA Inc.
- Biochar for stable solidification of heavy metals8 Sep 2026US 12,729,162 B2Chinese Research Academy of Environmental Sciences
- Satchel dispenser with an isolated dispersant chamber11 Aug 2026US 12,703,651 B2King Technology, Inc.
- Method of chelating anions from a liquid using a composition comprising at least one macrocyclic hosting moiety28 Jul 2026US 12,692,180 B2University of Pittsburgh—Of the Commonwealth System of Higher Education
- Scalable anion capture macrocycles28 Jul 2026US 12,692,272 B2Indiana University Research and Technology Corporation
- Derivatized polyamine polymers for use in metal scavenging applications8 Oct 2026US 2026/0308027 A1Bl Technologies, Inc.
- Improved biocide compositions13 Aug 2026US 2026/0231947 A1Solugen, Inc.
- Antiscalant Compositions and Methods of Use6 Aug 2026US 2026/0226340 A1Locus Solutions Ipco, LLC
- Removal of metal ions in water for electrolysis23 Jul 2026US 2026/0209091 A1University of Houston System
- Compositions and processes for removing heavy metals from phosphoric acid containing streams9 Jul 2026US 2026/0193083 A1Cytec Industries Inc.
Most cited
By later US patents
- Flue gas control system of coal combustion boiler and operating method thereof122US 8,071,060 B2Mitsubishi Heavy Industries, Ltd. · 2011
- Method for separating oil and water emulsions104US 4,938,876 A1990
- Rocks and aggregate, and methods of making and using the same102US 7,914,685 B2Calera Corporation · 2011
- Methods of sequestering CO299US 7,887,694 B2Calera Corporation · 2011
- Methods and systems for utilizing waste sources of metal oxides97US 7,754,169 B2Calera Corporation · 2010