C02F 1/681
By addition of solid materials for removing an oily layer on water
Official title: {by addition of solid materials for removing an oily layer on water}
C02F1/681 (By addition of solid materials for removing an oily layer on water) appears on 429 US grants and 257 published applications in this corpus.
Search patents in C02F- Granted patents
- 429
- Published applications
- 257
- Assignees
- 263
- Inventors
- 837
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 7 | 0 |
| 1978 | 11 | 0 |
| 1979 | 8 | 0 |
| 1980 | 13 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 9 | 0 |
| 1984 | 4 | 0 |
| 1985 | 6 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 5 | 0 |
| 1989 | 10 | 0 |
| 1990 | 8 | 0 |
| 1991 | 13 | 0 |
| 1992 | 8 | 0 |
| 1993 | 22 | 0 |
| 1994 | 19 | 0 |
| 1995 | 12 | 0 |
| 1996 | 9 | 0 |
| 1997 | 12 | 0 |
| 1998 | 15 | 0 |
| 1999 | 9 | 0 |
| 2000 | 7 | 0 |
| 2001 | 5 | 1 |
| 2002 | 6 | 12 |
| 2003 | 7 | 10 |
| 2004 | 7 | 8 |
| 2005 | 4 | 13 |
| 2006 | 3 | 6 |
| 2007 | 10 | 9 |
| 2008 | 6 | 9 |
| 2009 | 9 | 17 |
| 2010 | 13 | 9 |
| 2011 | 5 | 10 |
| 2012 | 5 | 27 |
| 2013 | 4 | 17 |
| 2014 | 18 | 22 |
| 2015 | 19 | 16 |
| 2016 | 7 | 14 |
| 2017 | 11 | 10 |
| 2018 | 15 | 8 |
| 2019 | 9 | 10 |
| 2020 | 5 | 7 |
| 2021 | 9 | 4 |
| 2022 | 3 | 2 |
| 2023 | 2 | 4 |
| 2024 | 5 | 8 |
| 2025 | 5 | 4 |
| 2026 | 4 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Filter for controlling pH of purified water and water purifier including the same22 Sep 2026US 12,741,892 B2Coway Co., Ltd.
- Oil and fuel collector25 Aug 2026US 12,714,951 B2Manvers Engineering Limited
- Buoyant water purification pad19 May 2026US 12,630,447 B2Maximideas Inc.
- Produced water antifoulant compositions and methods12 May 2026US 12,623,935 B2ChampionX LLC
- Method for making smart sand29 Apr 2025US 12,285,741 B2King Abdullah University of Science and Technology
- Surface slick cleanup using fatty acid salts17 Jul 2025US 2025/0230077 A1King Fahd University of Petroleum and Minerals
- Compositions and methods of use for enhanced soil removal and fat, oil, and grease reduction in drain products and discharges into water sources15 May 2025US 2025/0154036 A1Ecolab USA Inc.
- Compositions and Methods for Cleaning Contaminated Solids and Liquids20 Mar 2025US 2025/0091107 A1
- Imidazolium ionic liquids made using cardanol extracted from cashew nutshell oil to enhance crude oil recovery in oilfields2 Jan 2025US 2025/0001394 A1King Saud University
- Imidazolium ionic liquids made using cardanol extracted from cashew nutshell oil to enhance crude oil recovery in oilfields26 Dec 2024US 2024/0424478 A1King Saud University
Most cited
By later US patents
- Foam forming composition95US 3,997,467 APharmacia Aktiebolag · 1976
- Curb-inlet storm drain systems for filtering trash and hydrocarbons91US 6,106,707 AAbTech Industries, Inc. · 2000
- Hydrocarbon containment and control systems76US 4,111,813 A1978
- Absorbent pillow68US 4,497,712 AGeotech Development Corporation · 1985
- Methods for ameliorating oil spills in marine and inland waters62US 5,863,440 AAbTech Industries, Inc. · 1999