E21B 10/52
With chisel- or button-type inserts
Official title: with chisel- or button-type inserts
E21B10/52 (With chisel- or button-type inserts) appears on 380 US grants and 176 published applications in this corpus.
Search patents in E21B- Granted patents
- 380
- Published applications
- 176
- Assignees
- 70
- Inventors
- 412
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 6 | 0 |
| 1978 | 6 | 0 |
| 1979 | 8 | 0 |
| 1980 | 6 | 0 |
| 1981 | 8 | 0 |
| 1982 | 9 | 0 |
| 1983 | 8 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 9 | 0 |
| 1987 | 7 | 0 |
| 1988 | 7 | 0 |
| 1989 | 9 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 8 | 0 |
| 1993 | 5 | 0 |
| 1994 | 17 | 0 |
| 1995 | 10 | 0 |
| 1996 | 5 | 0 |
| 1997 | 8 | 0 |
| 1998 | 13 | 0 |
| 1999 | 10 | 0 |
| 2000 | 12 | 0 |
| 2001 | 12 | 5 |
| 2002 | 11 | 12 |
| 2003 | 13 | 11 |
| 2004 | 6 | 12 |
| 2005 | 8 | 9 |
| 2006 | 14 | 12 |
| 2007 | 8 | 7 |
| 2008 | 5 | 9 |
| 2009 | 3 | 5 |
| 2010 | 12 | 8 |
| 2011 | 4 | 6 |
| 2012 | 6 | 5 |
| 2013 | 7 | 9 |
| 2014 | 6 | 11 |
| 2015 | 7 | 6 |
| 2016 | 12 | 7 |
| 2017 | 5 | 8 |
| 2018 | 9 | 2 |
| 2019 | 6 | 4 |
| 2020 | 3 | 3 |
| 2021 | 9 | 4 |
| 2022 | 3 | 11 |
| 2023 | 2 | 2 |
| 2024 | 11 | 5 |
| 2025 | 4 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Non-uniform roller cone14 Jul 2026US 12,680,393 B2Schlumberger Technology Corporation
- Polycrystalline diamond and methods for fabricating the same14 Jul 2026US 12,680,395 B2US Synthetic Corporation
- Cutting insert assemblies and related systems and methods2 Dec 2025US 12,486,722 B2US Synthetic Corporation
- Method of handling slides7 Oct 2025US 12,435,574 B2Mikroscan Technologies
- Drill bit for boring earth and other hard materials27 May 2025US 12,312,868 B2Ulterra Drilling Technologies, L.P.
- Cutting element and methods of making same5 Feb 2026US 2026/0036002 A1Element Six (UK) Limited
- Apparatus for handling slides22 Jan 2026US 2026/0021489 A1Mikroscan Technologies
- Non-uniform roller cone28 Aug 2025US 2025/0270882 A1Schlumberger Technology Corporation
- Binderless or catalyst-free revolving pdc cutter3 Oct 2024US 2024/0328262 A1Saudi Arabian Oil Company
- Polycrystalline diamond and methods for fabricating the same18 Jul 2024US 2024/0240526 A1US Synthetic Corporation
Most cited
By later US patents
- Rock bits and inserts therefor390US 4,811,801 ASmith International, Inc. · 1989
- Double cemented carbide composites169US 5,880,382 ASmith International, Inc. · 1999
- Surface geometry for non-planar drill inserts168US 6,196,340 B1US Synthetic Corporation · 2001
- Cutting elements for rotary drill bits147US 5,469,927 ACamco International Inc. · 1995
- Methods of manufacturing gradient composite metallic structures146US 4,398,952 AReed Rock Bit Company · 1983