C09K 23/22
Amides or hydrazides
C09K23/22 (Amides or hydrazides) appears on 155 US grants and 107 published applications in this corpus.
Search patents in C09K- Granted patents
- 155
- Published applications
- 107
- Assignees
- 109
- Inventors
- 430
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 8 | 0 |
| 1992 | 6 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 9 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 6 | 1 |
| 2002 | 6 | 1 |
| 2003 | 1 | 4 |
| 2004 | 6 | 9 |
| 2005 | 0 | 6 |
| 2006 | 3 | 2 |
| 2007 | 4 | 7 |
| 2008 | 1 | 5 |
| 2009 | 3 | 4 |
| 2010 | 1 | 3 |
| 2011 | 3 | 2 |
| 2012 | 4 | 3 |
| 2013 | 1 | 6 |
| 2014 | 2 | 3 |
| 2015 | 5 | 3 |
| 2016 | 3 | 5 |
| 2017 | 6 | 4 |
| 2018 | 3 | 2 |
| 2019 | 2 | 5 |
| 2020 | 2 | 4 |
| 2021 | 2 | 7 |
| 2022 | 4 | 9 |
| 2023 | 3 | 5 |
| 2024 | 4 | 3 |
| 2025 | 4 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Dispersant and polishing agent composition17 Mar 2026US 12,577,431 B2Toagosei Co., Ltd.
- Amphoteric compounds6 Jan 2026US 12,516,019 B2Eastman Chemical Company
- Emulsifier for synthetic-based mud, process for preparation, and drilling method28 Oct 2025US 12,454,639 B2Schlumberger Technology Corporation
- Aromatic amide dispersant7 Oct 2025US 12,435,275 B2Lubrizol Advanced Materials, Inc.
- Process for the aqueous extraction of biosurfactants from corn steep liquor12 Aug 2025US 12,383,847 B2Universidade De Vigo
- Non-ionic surfactants and methods of making and using the same2 Jul 2026US 2026/0184995 A1Life Technologies Corporation
- Polymeric amidoamine emulsifiers13 Nov 2025US 2025/0346797 A1Schlumberger Technology Corporation
- Composition and method for abating fouling by low-density inorganic, organic and inorganic-organic hybrid foulants in hydrocarbon processes10 Apr 2025US 2025/0115811 A1Ecolab USA Inc.
- Solid emulsifiers, drilling fluids, and methods of making and using the same27 Mar 2025US 2025/0101309 A1
- Multi-amine dispersant made via an anhydride intermediate17 Oct 2024US 2024/0343977 A1Lubrizol Advanced Materials, Inc.
Most cited
By later US patents
- Amphoteric surfactants having multiple hydrophobic and hydrophilic groups92US 5,914,310 ARhodia Inc. · 1999
- Compositions containing combinations of surfactants and derivatives of succinic acylating agent or hydroxyaromatic compounds and methods of using the same89US 5,330,662 AThe Lubrizol Corporation · 1994
- Drilling fluid containing a surfactant having a high boiling point and a long chain tail group58US 9,587,162 B2Halliburton Energy Services.Inc. · 2017
- Drilling fluid containing a surfactant having a high boiling point and a long chain tail group51US 9,587,161 B2Halliburton Energy Services.Inc. · 2017
- Emulsifiers for bituminous emulsions47US 4,547,224 AWestvaco Corporation · 1985