E21B 10/16
Characterised by tooth form or arrangement
Official title: characterised by tooth form or arrangement
E21B10/16 (Characterised by tooth form or arrangement) appears on 337 US grants and 238 published applications in this corpus.
Search patents in E21B- Granted patents
- 337
- Published applications
- 238
- Assignees
- 70
- Inventors
- 389
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 8 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 9 | 0 |
| 1995 | 7 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 9 | 0 |
| 1999 | 8 | 0 |
| 2000 | 9 | 0 |
| 2001 | 13 | 7 |
| 2002 | 13 | 10 |
| 2003 | 19 | 15 |
| 2004 | 9 | 23 |
| 2005 | 9 | 24 |
| 2006 | 12 | 16 |
| 2007 | 8 | 14 |
| 2008 | 16 | 27 |
| 2009 | 13 | 13 |
| 2010 | 19 | 8 |
| 2011 | 12 | 7 |
| 2012 | 3 | 5 |
| 2013 | 11 | 7 |
| 2014 | 6 | 8 |
| 2015 | 7 | 10 |
| 2016 | 9 | 6 |
| 2017 | 6 | 5 |
| 2018 | 4 | 5 |
| 2019 | 6 | 7 |
| 2020 | 7 | 3 |
| 2021 | 5 | 5 |
| 2022 | 2 | 4 |
| 2023 | 3 | 2 |
| 2024 | 1 | 1 |
| 2025 | 1 | 2 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Earth-boring tools, hybrid earth-boring tools, and associated apparatus and methods29 Sep 2026US 12,747,636 B2Baker Hughes Oilfield Operations LLC
- Earth boring rotary bit and method1 Sep 2026US 12,723,473 B2Sandvik Mining and Construction Tools AB
- Non-uniform roller cone14 Jul 2026US 12,680,393 B2Schlumberger Technology Corporation
- Abrasive articles and methods for forming same24 Feb 2026US 12,559,657 B2Saint-Gobain Abrasives, Inc.
- Earth-boring tool geometry and associated apparatus and methods19 Aug 2025US 12,392,199 B2
- Earth-boring tools, hybrid earth-boring tools, and associated apparatus and methods27 Aug 2026US 2026/0251018 A1Baker Hughes Oilfield Operations LLC
- Pdc-roller hybrid drill bit6 Aug 2026US 2026/0226798 A1China Petroleum & Chemical Corporation
- Earth boring rotary bit and method9 Apr 2026US 2026/0098448 A1Sandvik Mining and Construction Tools AB
- Cutting element and methods of making same5 Feb 2026US 2026/0036002 A1Element Six (UK) Limited
- Blunt-nosed roller cone hybrid bit25 Dec 2025US 2025/0389159 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Drill bit arcuate-shaped inserts with cutting edges and method of manufacture391US 7,331,410 B2Smith International, Inc. · 2008
- Fixed cutter bit with chisel or vertical cutting elements142US 6,332,503 B1Baker Hughes Incorporated · 2001
- Polycrystalline diamond cutters having modified residual stresses138US 6,220,375 B1Baker Hughes Incorporated · 2001
- Ultra hard insert cutters for heel row rotary cone rock bit applications137US 5,351,770 ASmith International, Inc. · 1994
- Multiple grade carbide for diamond capped insert132US 6,499,547 B2Baker Hughes Incorporated · 2002