C10M 137/04
Phosphate esters
C10M137/04 (Phosphate esters) appears on 1,270 US grants and 663 published applications in this corpus.
Search patents in C10M- Granted patents
- 1,270
- Published applications
- 663
- Assignees
- 344
- Inventors
- 2,244
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 7 | 0 |
| 1978 | 21 | 0 |
| 1979 | 23 | 0 |
| 1980 | 19 | 0 |
| 1981 | 20 | 0 |
| 1982 | 7 | 0 |
| 1983 | 20 | 0 |
| 1984 | 30 | 0 |
| 1985 | 31 | 0 |
| 1986 | 23 | 0 |
| 1987 | 22 | 0 |
| 1988 | 30 | 0 |
| 1989 | 30 | 0 |
| 1990 | 27 | 0 |
| 1991 | 27 | 0 |
| 1992 | 21 | 0 |
| 1993 | 26 | 0 |
| 1994 | 48 | 0 |
| 1995 | 31 | 0 |
| 1996 | 55 | 0 |
| 1997 | 59 | 0 |
| 1998 | 73 | 0 |
| 1999 | 57 | 0 |
| 2000 | 38 | 0 |
| 2001 | 42 | 7 |
| 2002 | 33 | 35 |
| 2003 | 34 | 15 |
| 2004 | 14 | 13 |
| 2005 | 9 | 9 |
| 2006 | 5 | 8 |
| 2007 | 2 | 12 |
| 2008 | 2 | 21 |
| 2009 | 6 | 9 |
| 2010 | 4 | 12 |
| 2011 | 10 | 11 |
| 2012 | 8 | 13 |
| 2013 | 9 | 13 |
| 2014 | 13 | 25 |
| 2015 | 9 | 21 |
| 2016 | 14 | 27 |
| 2017 | 18 | 34 |
| 2018 | 25 | 45 |
| 2019 | 20 | 74 |
| 2020 | 35 | 34 |
| 2021 | 34 | 43 |
| 2022 | 46 | 41 |
| 2023 | 38 | 48 |
| 2024 | 32 | 32 |
| 2025 | 32 | 32 |
| 2026 | 21 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Lubricant compositions for reduced pre-ignition in hydrogen fueled engines29 Sep 2026US 12,747,407 B2Infineum International Limited
- Grease composition22 Sep 2026US 12,742,129 B2Kyodo Yushi Co., Ltd.
- Refrigerator oil composition and refrigerator mixture composition21 Jul 2026US 12,686,833 B2Idemitsu Kosan Co., Ltd.
- Multipurpose oxypyridinones and their functional use-37 Jul 2026US 12,674,113 B2Infineum International Limited
- Use of molybdenum compounds in driveline lubricants for reduced friction and copper corrosion23 Jun 2026US 12,662,647 B2Afton Chemical Corporation
- Lubricating oil composition8 Oct 2026US 2026/0308474 A1Eneos Corporation
- Friction modifier for automatic transmission fluid24 Sep 2026US 2026/0286243 A1Chevron Oronite Company LLC
- Use of molybdenum compounds in driveline lubricants for reduced friction and copper corrosion24 Sep 2026US 2026/0286245 A1Afton Chemical Corporation
- Grease composition17 Sep 2026US 2026/0275219 A1Idemitsu Kosan Co., Ltd.
- Hydraulic fluid compositions for agricultural machinery17 Sep 2026US 2026/0275227 A1Chevron Oronite Company LLC
Most cited
By later US patents
- High performance lubricating oils102US 6,180,575 B2Mobil Oil Corporation · 2001
- Metal-containing lubricant compositions90US 4,767,551 AAmoco Corporation · 1988
- Antiemulsion/antifoam agent for use in oils86US 5,084,197 AThe Lubrizol Corporation · 1992
- Ashless dispersants formed from substituted acylating agents and their production and use82US 5,137,980 AEthyl Petroleum Additives, Inc. · 1992
- Thermoplastic compatible lubricant for plastic conveyor systems77US 5,559,087 AEcolab Inc. · 1996