C09K 23/32
Heterocyclic compounds
C09K23/32 (Heterocyclic compounds) appears on 20 US grants and 21 published applications in this corpus.
Search patents in C09K- Granted patents
- 20
- Published applications
- 21
- Assignees
- 23
- Inventors
- 74
- Latest grant
- 14 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 2 |
| 2017 | 2 | 1 |
| 2018 | 0 | 2 |
| 2019 | 0 | 1 |
| 2020 | 2 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 1 |
| 2023 | 1 | 2 |
| 2024 | 0 | 1 |
| 2025 | 1 | 3 |
By publication year. Applications have been published since 2001.
Recent patents
- Phytol-based surfactants and methods therefor14 Jan 2025US 12,195,662 B2Alliance for Sustainable Energy, LLC
- Polymer dispersant, colorant dispersion liquid, and ink composition26 Dec 2023US 11,851,517 B2Seiko Epson Corporation
- Acid labile surfactants3 Nov 2020US 10,822,323 B2Waters Technologies Corporation
- Process for preparing alkyl pyroglutamic acids3 Mar 2020US 10,577,319 B2Dow Global Technologies LLC
- Heterocyclic amphoteric compounds21 Nov 2017US 9,822,073 B2Eastman Chemical Company
- Biobased surfactants31 Jul 2025US 2025/0243233 A1
- Emulsifying compositions comprising fatty acid or fatty ester reaction products of saccharide polymers formulated with mixed surfactants22 May 2025US 2025/0163327 A1Integrity Bio-Chemicals, LLC
- Oil dispersant formulation, methods and uses thereof9 Jan 2025US 2025/0011651 A1Instituto Superior Tecnico
- Nonionic, redox-cleavable surfactant for mass spectrometry-based proteomics and structural biological applications7 Mar 2024US 2024/0076553 A1
- Composition and Method for Producing Same and Cosmetic Agent28 Dec 2023US 2023/0414481 A1Asahi Kasei Finechem Co., Ltd.
Most cited
By later US patents
- Zwiterionic 2-alkyl imidazolines as emulsifying agents for oil based drilling fluids16US 4,544,756 ADresser Industries, Inc. · 1985
- Indican and suspensions and gels thereof and their uses15US 4,338,432 ATalres Development (N.A.) N.V. · 1982
- Substituted imidazoline reactions with chloroacetate salts13US 4,269,730 AStepan Chemical Company · 1981
- Alumina dispersant, alumina dispersion liquid, agent for treating inkjet-printing materials, and inkjet-printing materials13US 6,476,083 B1Taiho Industries Co., Ltd. · 2002
- Sulfur-containing polyoxyalkylenes10US 4,259,474 AGAF Corporation · 1981