E21B 10/24
Characterised by lubricating details
Official title: characterised by lubricating details (E21B10/23 takes precedence)
E21B10/24 (Characterised by lubricating details) appears on 213 US grants and 86 published applications in this corpus.
Search patents in E21B- Granted patents
- 213
- Published applications
- 86
- Assignees
- 65
- Inventors
- 284
- Latest grant
- 13 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 10 | 0 |
| 1981 | 15 | 0 |
| 1982 | 5 | 0 |
| 1983 | 11 | 0 |
| 1984 | 8 | 0 |
| 1985 | 8 | 0 |
| 1986 | 10 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 7 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 2 |
| 2002 | 2 | 2 |
| 2003 | 3 | 2 |
| 2004 | 3 | 1 |
| 2005 | 0 | 5 |
| 2006 | 3 | 3 |
| 2007 | 4 | 3 |
| 2008 | 3 | 7 |
| 2009 | 3 | 7 |
| 2010 | 2 | 4 |
| 2011 | 4 | 5 |
| 2012 | 2 | 1 |
| 2013 | 5 | 3 |
| 2014 | 1 | 5 |
| 2015 | 4 | 1 |
| 2016 | 3 | 10 |
| 2017 | 3 | 5 |
| 2018 | 6 | 4 |
| 2019 | 4 | 5 |
| 2020 | 7 | 4 |
| 2021 | 3 | 3 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Retainer for rotary cone drill bit13 May 2025US 12,297,698 B2Caterpillar Inc.
- Cutting roller9 Jan 2024US 11,866,999 B2Hydac Technology GmbH
- Isolated lubrication system for drill bits21 Feb 2023US 11,585,158 B2Caterpillar Inc.
- Grease system for high pressure plug valves22 Feb 2022US 11,255,446 B1BlueCore Completions, LLC
- Dual function pressure compensator for a lubricant reservoir of a sealed rock bit12 Oct 2021US 11,142,958 B1
- Pdc-roller hybrid drill bit6 Aug 2026US 2026/0226798 A1China Petroleum & Chemical Corporation
- Retainer for rotary cone drill bit30 Jan 2025US 2025/0034948 A1Caterpillar Inc.
- Grease with nanoparticles for tricone bits30 Jan 2025US 2025/0034950 A1Caterpillar Inc.
- Phosphating and solid lubrication to reduce wear in bearings30 Jan 2025US 2025/0035158 A1Caterpillar Inc.
- Isolated lubrication system for drill bits25 Nov 2021US 2021/0363830 A1Caterpillar Inc., Peoria, IL
Most cited
By later US patents
- Thin film treated drilling bit cones111US 4,054,426 A1977
- Earth drilling knobby bit105US 4,096,917 A1978
- Compensator for earth boring bits104US 4,727,942 AHughes Tool Company · 1988
- Hydrodynamic lubricant seal for drill bits94US 4,610,319 A1986
- Modular drill bit91US 5,224,560 AModular Engineering Corporation · 1993