E21B 10/04
With core destroying means
Official title: with core destroying means
E21B10/04 (With core destroying means) appears on 83 US grants and 22 published applications in this corpus.
Search patents in E21B- Granted patents
- 83
- Published applications
- 22
- Assignees
- 46
- Inventors
- 156
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 0 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 2 | 0 |
| 2015 | 0 | 1 |
| 2016 | 2 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 0 | 2 |
| 2020 | 4 | 1 |
| 2021 | 2 | 5 |
| 2022 | 2 | 1 |
| 2023 | 2 | 2 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
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- Continuous sampling drill bit12 Nov 2024US 12,139,985 B2Veracio Ltd.
- Continuous sampling drill bit5 Sep 2023US 11,746,600 B2Longyear TM, Inc.
- Inner cutter for drilling23 May 2023US 11,655,681 B2Halliburton Energy Services.Inc.
- Drill bit with joint function of induced unloading and abrasive jet and drilling method thereof22 Feb 2022US 11,255,127 B2China University of Petroleum (East China)
- Continuous Sampling Drill Bit30 Oct 2025US 2025/0334007 A1Veracio Ltd.
- Continuous Sampling Drill Bit4 Jan 2024US 2024/0003192 A1Longyear TM, Inc.
- Continuous sampling drill bit9 Nov 2023US 2023/0358103 A1Veracio Ltd.
- Continuous Sampling Drill Bit8 Jun 2023US 2023/0175334 A1Longyear TM, Inc.
- Continuous sampling drill bit15 Sep 2022US 2022/0290501 A1Bly IP Inc.
Most cited
By later US patents
- Combination drill bit328US 5,016,718 A1991
- Self-centering polycrystalline diamond cutting rock bit135US 5,655,614 ASmith International, Inc. · 1997
- Rotary drill bit96US 4,640,374 AStrata Bit Corporation · 1987
- Rotary drill bit95US 4,538,691 AStrata Bit Corporation · 1985
- Deep hole rock drill bit94US 4,445,580 ASyndrill Carbide Diamond Company · 1984