E21C 35/1835
Chemical composition or specific material
Official title: {Chemical composition or specific material}
E21C35/1835 (Chemical composition or specific material) appears on 94 US grants and 70 published applications in this corpus.
Search patents in E21C- Granted patents
- 94
- Published applications
- 70
- Assignees
- 31
- Inventors
- 130
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 6 |
| 2014 | 3 | 8 |
| 2015 | 2 | 6 |
| 2016 | 4 | 3 |
| 2017 | 3 | 3 |
| 2018 | 3 | 4 |
| 2019 | 9 | 11 |
| 2020 | 3 | 1 |
| 2021 | 10 | 6 |
| 2022 | 3 | 7 |
| 2023 | 4 | 5 |
| 2024 | 4 | 0 |
| 2025 | 1 | 3 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rebuildable hard surface cutting tip for mining bit14 Apr 2026US 12,601,259 B2Bit Service Company LTD
- Cemented carbide insert with eta-phase core24 Feb 2026US 12,559,806 B2Sandvik Mining and Construction Tools AB
- Rotatable cutting tool with cutting insert and bolster24 Feb 2026US 12,560,085 B2Kennametal Inc.
- Method of treating a cemented carbide mining insert10 Feb 2026US 12,545,977 B2Sandvik Mining and Construction Tools AB
- Bolsters for degradation picks11 Mar 2025US 12,247,486 B2Schlumberger Technology Corporation
- Rebuildable hard surface cutting tip for mining bit25 Jun 2026US 2026/0176967 A1Bit Service Company LTD
- Cemented carbide insert with eta-phase core21 May 2026US 2026/0139338 A1Sandvik Mining and Construction Tools AB
- Bolsters for degradation picks1 Jan 2026US 2026/0002443 A1Schlumberger Technology Corporation
- Cemented carbide insert with eta-phase core24 Apr 2025US 2025/0129442 A1Sandvik Mining and Construction Tools AB
- Rebuildable hard surface cutting tip for mining bit17 Apr 2025US 2025/0122803 A1Bit Service Company LTD
Most cited
By later US patents
- Sintered and forged article, and method of forming same145US 4,484,644 AIngersoll-Rand Company · 1984
- Self renewing working tip mining pick144US 4,277,106 ASyndrill Carbide Diamond Company · 1981
- Cemented carbide tip126US 5,141,289 AKennametal Inc. · 1992
- Cutter inserts for picks122US 4,678,237 AHuddy Diamond Crown Setting Company (Proprietary) Limited · 1987
- Erosion resistant cutting bit with hardfacing122US 4,725,098 AKennametal Inc. · 1988