C09K 5/20
Antifreeze additives therefor
Official title: Antifreeze additives therefor, e.g. for radiator liquids (for application to surfaces C09K3/18; inhibiting corrosion by liquids C23F11/00)
C09K5/20 (Antifreeze additives therefor) appears on 395 US grants and 301 published applications in this corpus.
Search patents in C09K- Granted patents
- 395
- Published applications
- 301
- Assignees
- 200
- Inventors
- 625
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 13 | 0 |
| 1981 | 6 | 0 |
| 1982 | 9 | 0 |
| 1983 | 7 | 0 |
| 1984 | 14 | 0 |
| 1985 | 8 | 0 |
| 1986 | 11 | 0 |
| 1987 | 18 | 0 |
| 1988 | 8 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 9 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 10 | 0 |
| 1995 | 6 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 14 | 0 |
| 1999 | 12 | 0 |
| 2000 | 7 | 0 |
| 2001 | 10 | 0 |
| 2002 | 7 | 7 |
| 2003 | 4 | 13 |
| 2004 | 10 | 15 |
| 2005 | 5 | 7 |
| 2006 | 4 | 17 |
| 2007 | 2 | 22 |
| 2008 | 10 | 11 |
| 2009 | 4 | 16 |
| 2010 | 13 | 13 |
| 2011 | 12 | 8 |
| 2012 | 8 | 6 |
| 2013 | 12 | 14 |
| 2014 | 9 | 24 |
| 2015 | 9 | 8 |
| 2016 | 15 | 9 |
| 2017 | 9 | 9 |
| 2018 | 8 | 14 |
| 2019 | 5 | 12 |
| 2020 | 5 | 13 |
| 2021 | 9 | 16 |
| 2022 | 9 | 9 |
| 2023 | 7 | 11 |
| 2024 | 5 | 11 |
| 2025 | 5 | 7 |
| 2026 | 7 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Compositions and systems for elastic turbulence29 Sep 2026US 12,747,382 B2Schlumberger Technology Corporation
- Coolant with low electrical conductivity4 Aug 2026US 12,698,430 B2BASF SE
- Metal working fluid decontamination apparatus21 Apr 2026US 12,605,474 B2
- Coolant composition and concentrated coolant composition21 Apr 2026US 12,606,730 B2Japan Chemical Industries Co., Ltd.
- Antifreeze for fire sprinkler systems17 Mar 2026US 12,576,296 B2Tyco Fire Products LP
- Heat Transfer System with Organic, Non-Ionic Inhibitors Compatible with Flux Exposure in Fuel Cell Operations10 Sep 2026US 2026/0265599 A1CCI North America Corporation
- Flux Compatible Heat Transfer Media3 Sep 2026US 2026/0258292 A1CCI North America Corporation
- Metal working fluid decontamination apparatus6 Aug 2026US 2026/0224763 A1
- Nanoparticle coolant additive for direct-to-chip cooling16 Jul 2026US 2026/0201234 A1Htms (Dtc IP) Limited
- Traced corrosion inhibitor for closed loop systems9 Jul 2026US 2026/0193510 A1Chemtreat, Inc.
Most cited
By later US patents
- Method of cleaning internal combustion engine cooling system and filter for use therein98US 5,050,549 A1991
- Monobasic-dibasic acid/salt antifreeze corrosion inhibitor68US 4,647,392 AS. A. Texaco Belgium N.V. · 1987
- Method of inhibiting cavitation-erosion corrosion of aluminum surfaces using carboxylic acid based compositions comprising polymerizable-acid graft polymers68US 6,143,243 APrestone Products Corporation · 2000
- Deicing composition and method57US 5,709,813 A1998
- Freezing-point-lowering composition and method53US 4,448,702 ALang & Co., Chemisch-Technische Produkte Kommanditgesellschaft · 1984