E21C 35/1831
Fixing methods or devices
Official title: {Fixing methods or devices}
E21C35/1831 (Fixing methods or devices) appears on 144 US grants and 116 published applications in this corpus.
Search patents in E21C- Granted patents
- 144
- Published applications
- 116
- Assignees
- 44
- Inventors
- 186
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 4 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 11 | 27 |
| 2009 | 7 | 6 |
| 2010 | 5 | 4 |
| 2011 | 8 | 6 |
| 2012 | 3 | 3 |
| 2013 | 3 | 9 |
| 2014 | 4 | 2 |
| 2015 | 6 | 12 |
| 2016 | 4 | 4 |
| 2017 | 4 | 7 |
| 2018 | 5 | 6 |
| 2019 | 11 | 6 |
| 2020 | 6 | 1 |
| 2021 | 8 | 4 |
| 2022 | 4 | 3 |
| 2023 | 1 | 2 |
| 2024 | 2 | 1 |
| 2025 | 2 | 2 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wear protection cap and a bit holder arrangement2 Jun 2026US 12,644,384 B2Sandvik Mining and Construction Oy
- Rotatable cutting tool with cutting insert and bolster24 Feb 2026US 12,560,085 B2Kennametal Inc.
- Bit tip insert1 Jul 2025US 12,345,158 B1The Sollami Company
- Bolsters for degradation picks11 Mar 2025US 12,247,486 B2Schlumberger Technology Corporation
- Rotary tool with thermally stable diamond9 Apr 2024US 11,952,896 B2Schlumberger Technology Corporation
- Modular carbide tooling, hard and exotic materials combined with holders of different materials with options for wear and protection and machine tie30 Jul 2026US 2026/0218611 A1Kennametal Inc.
- Bolsters for degradation picks1 Jan 2026US 2026/0002443 A1Schlumberger Technology Corporation
- Rotatable cutting tool with cutting insert and bolster13 Feb 2025US 2025/0052154 A1Kennametal Inc.
- Wear protection cap and a bit holder arrangement13 Feb 2025US 2025/0052155 A1Sandvik Mining and Construction Oy
- Adapter and wear tool comprising same31 Oct 2024US 2024/0360727 A1Commonwealth Scientific and Industrial Research Organisation
Most cited
By later US patents
- Point attack bit156US 6,019,434 AFansteel Inc. · 2000
- Cutting bit insert configured in a polygonal pyramid shape and having a ring mounted in surrounding relationship with the insert151US 6,196,636 B12001
- Self-sharpening nosepiece with skirt for attack tools144US 5,823,632 A1998
- Cutting tool with hardened tip having a tapered base144US 6,739,327 B2The Sollami Company · 2004
- Cemented carbide tip126US 5,141,289 AKennametal Inc. · 1992