B03D 1/011
Quaternary ammonium compounds
Official title: {Quaternary ammonium compounds}
B03D1/011 (Quaternary ammonium compounds) appears on 60 US grants and 51 published applications in this corpus.
Search patents in B03D- Granted patents
- 60
- Published applications
- 51
- Assignees
- 42
- Inventors
- 128
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 2 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 3 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 2 | 2 |
| 2014 | 1 | 3 |
| 2015 | 2 | 6 |
| 2016 | 3 | 2 |
| 2017 | 3 | 1 |
| 2018 | 2 | 2 |
| 2019 | 3 | 5 |
| 2020 | 2 | 6 |
| 2021 | 3 | 3 |
| 2022 | 0 | 2 |
| 2023 | 7 | 3 |
| 2024 | 5 | 6 |
| 2025 | 1 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Mining collectors6 Oct 2026US 12,752,286 B2
- Enhanced foam fractionation of oil phase from aqueous/oil mixed phase via increased viscoelasticity8 Sep 2026US 12,729,140 B2Ecolab USA Inc.
- Enhanced foam removal of total suspended solids and multiply charged cations from aqueous or aqueous/oil mixed phase via increased viscoelasticity30 Sep 2025US 12,428,318 B2Ecolab USA Inc.
- Collectors for flotation process31 Dec 2024US 12,180,341 B2BASF SE
- Collector composition containing biodegradable compound and process for treating siliceous ores17 Dec 2024US 12,168,237 B2Nouryon Chemicals International B. V.
- Enhanced foam removal of total suspended solids and multiply charged cations from aqueous or aqueous/oil mixed phase via increased viscoelasticity1 Jan 2026US 2026/0001783 A1Ecolab USA Inc.
- The control of continuous water treatment14 Aug 2025US 2025/0256998 A1The Water & Carbon Group Pty, Ltd.
- Stable ionic xanthate compositions in aqueous solution24 Jul 2025US 2025/0235878 A1Oxiquim S.A.
- Systems and methods for separation of rare earth elements using air flotation28 Nov 2024US 2024/0391799 A1Batelle Memorial Institute
- Methods for Pollucite Flotation, Plagioclase Flotation, and Quartz Purification31 Oct 2024US 2024/0359190 A1
Most cited
By later US patents
- Foaming surfactant compositions383US 4,565,647 AThe Procter & Gamble Company · 1986
- Methods for treating hydrocarbon recovery operations and industrial waters23US 5,013,451 APetrolite Corporation · 1991
- Flotation of minerals21US 4,594,151 ASociete Nationale Elf Aquitaine (Production) · 1986
- Materials and processes for flotation of mineral substances20US 4,139,455 AAllied Colloids Limited · 1979
- Calcium carbonate beneficiation20US 4,995,965 AAkzo America Inc. · 1991