E21B 10/40
With leading portion
Official title: with leading portion
E21B10/40 (With leading portion) appears on 109 US grants and 59 published applications in this corpus.
Search patents in E21B- Granted patents
- 109
- Published applications
- 59
- Assignees
- 53
- Inventors
- 161
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 5 | 3 |
| 2003 | 0 | 1 |
| 2004 | 2 | 7 |
| 2005 | 1 | 1 |
| 2006 | 7 | 5 |
| 2007 | 2 | 3 |
| 2008 | 2 | 1 |
| 2009 | 2 | 2 |
| 2010 | 3 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 5 |
| 2015 | 2 | 2 |
| 2016 | 1 | 5 |
| 2017 | 3 | 3 |
| 2018 | 2 | 5 |
| 2019 | 4 | 1 |
| 2020 | 4 | 3 |
| 2021 | 2 | 2 |
| 2022 | 4 | 2 |
| 2023 | 1 | 3 |
| 2024 | 3 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Producing hydro-efflux hammer using catalyst-free PDC cutters5 May 2026US 12,617,015 B2Saudi Arabian Oil Company
- Hole opener27 Aug 2024US 12,071,816 B2Precise Drilling Components Ltd
- Hybrid bit including earth boring and percussion elements for drilling earth formations14 May 2024US 11,982,129 B2
- Downhole tool2 Jan 2024US 11,859,459 B2Welltec A/S
- Drilling head for a percussive displacement ground drilling device and use of a drilling head for a percussive displacement ground drilling device26 Sep 2023US 11,767,716 B2TRACTO-TECHNIK GmbH & Co. KG
- Producing hydro-efflux hammer using catalyst-free pdc cutters20 Aug 2026US 2026/0241447 A1Saudi Arabian Oil Company
- Ringbit for drilling tool and drilling tool6 Nov 2025US 2025/0339905 A1Robit PLC
- Producing hydro-efflux hammer using catalyst-free pdc cutters29 Jun 2023US 2023/0201921 A1Saudi Arabian Oil Company
- Hole opener15 Jun 2023US 2023/0184040 A1Precise Drilling Components Ltd
- Downhole tool2 Mar 2023US 2023/0064823 A1Welltec A/S
Most cited
By later US patents
- Downhole drill bit and bit coupling155US 4,962,822 ANuma Tool Company · 1990
- Drilling apparatus for replacing underground pipes113US 5,791,419 ARD Trenchless Ltd. Oy · 1998
- Drill for rock100US 3,960,223 AGebrueder Heller · 1976
- Drill apparatus having a primary drill and a pilot drill98US 4,852,672 A1989
- Percussion drill bit having centrally projecting insert85US 4,304,312 ASandvik Aktiebolag · 1981