C10N 2040/08
Hydraulic fluids
Official title: Hydraulic fluids, e.g. brake-fluids
C10N2040/08 (Hydraulic fluids) appears on 1,940 US grants and 938 published applications in this corpus.
Search patents in C10N- Granted patents
- 1,940
- Published applications
- 938
- Assignees
- 509
- Inventors
- 2,942
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 88 | 0 |
| 1977 | 62 | 0 |
| 1978 | 69 | 0 |
| 1979 | 61 | 0 |
| 1980 | 45 | 0 |
| 1981 | 58 | 0 |
| 1982 | 48 | 0 |
| 1983 | 37 | 0 |
| 1984 | 32 | 0 |
| 1985 | 24 | 0 |
| 1986 | 27 | 0 |
| 1987 | 46 | 0 |
| 1988 | 58 | 0 |
| 1989 | 59 | 0 |
| 1990 | 60 | 0 |
| 1991 | 62 | 0 |
| 1992 | 49 | 0 |
| 1993 | 70 | 0 |
| 1994 | 82 | 0 |
| 1995 | 56 | 0 |
| 1996 | 43 | 0 |
| 1997 | 59 | 0 |
| 1998 | 57 | 0 |
| 1999 | 42 | 0 |
| 2000 | 28 | 0 |
| 2001 | 29 | 9 |
| 2002 | 28 | 20 |
| 2003 | 24 | 30 |
| 2004 | 20 | 28 |
| 2005 | 4 | 23 |
| 2006 | 6 | 29 |
| 2007 | 10 | 50 |
| 2008 | 10 | 32 |
| 2009 | 14 | 45 |
| 2010 | 27 | 57 |
| 2011 | 25 | 31 |
| 2012 | 32 | 46 |
| 2013 | 29 | 50 |
| 2014 | 32 | 43 |
| 2015 | 25 | 40 |
| 2016 | 31 | 49 |
| 2017 | 39 | 31 |
| 2018 | 21 | 43 |
| 2019 | 24 | 66 |
| 2020 | 30 | 34 |
| 2021 | 41 | 40 |
| 2022 | 35 | 34 |
| 2023 | 20 | 41 |
| 2024 | 30 | 30 |
| 2025 | 20 | 22 |
| 2026 | 12 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Environmentally acceptable lubricant compositions14 Jul 2026US 12,680,050 B2Polnox Corporation
- Lubricating compositions9 Jun 2026US 12,649,892 B2Tribodyn, Inc.
- Hydrolytically stable hydraulic lubricant26 May 2026US 12,637,632 B2Afton Chemical Corporation
- Metal working fluid decontamination apparatus21 Apr 2026US 12,605,474 B2
- Lubricating oil composition14 Apr 2026US 12,600,918 B2Idemitsu Kosan Co., Ltd.
- Lubricating oil composition17 Sep 2026US 2026/0275224 A1Shell USA, Inc.
- Hydraulic fluid compositions for agricultural machinery17 Sep 2026US 2026/0275227 A1Chevron Oronite Company LLC
- Biobased lubricants10 Sep 2026US 2026/0265631 A1Cargill, Incorporated
- New low-viscosity functional liquids10 Sep 2026US 2026/0265632 A1BASF SE
- Viscosity index improver composition and lubricating oil composition3 Sep 2026US 2026/0258318 A1Sanyo Chemical Industries, Ltd.
Most cited
By later US patents
- Refrigerator oil, compressor oil composition, hydraulic fluid composition, metalworking fluid composition, heat treatment oil composition, lubricant composition for machine tool and lubricant composition779US 8,193,129 B2Nippon Oil Co., Ltd. · 2012
- Multilayer information disc192US 4,450,553 AU. S. Philips Corporation · 1984
- Polyolefinic copolymer additives for lubricants and fuels123US 4,160,739 ARohm and Haas Company · 1979
- Water-dispersible hydrophobic thickening agent122US 4,432,881 AThe Dow Chemical Company · 1984
- Novel VI improver, dispersant, and anti-oxidant additive and lubricating oil composition containing same122US 4,863,623 ATexaco Inc. · 1989