E21C 35/00
Details of, or accessories for, machines for slitting or completely freeing the
Official title: Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
E21C35/00 (Details of, or accessories for, machines for slitting or completely freeing the) appears on 1,665 US grants and 1,101 published applications in this corpus.
Search patents in E21C- Granted patents
- 1,665
- Published applications
- 1,101
- Assignees
- 413
- Inventors
- 1,961
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 34 | 0 |
| 1977 | 34 | 0 |
| 1978 | 49 | 0 |
| 1979 | 20 | 0 |
| 1980 | 44 | 0 |
| 1981 | 50 | 0 |
| 1982 | 28 | 0 |
| 1983 | 26 | 0 |
| 1984 | 38 | 0 |
| 1985 | 36 | 0 |
| 1986 | 35 | 0 |
| 1987 | 45 | 0 |
| 1988 | 26 | 0 |
| 1989 | 29 | 0 |
| 1990 | 29 | 0 |
| 1991 | 18 | 0 |
| 1992 | 32 | 0 |
| 1993 | 22 | 0 |
| 1994 | 18 | 0 |
| 1995 | 9 | 0 |
| 1996 | 16 | 0 |
| 1997 | 19 | 0 |
| 1998 | 22 | 0 |
| 1999 | 13 | 0 |
| 2000 | 19 | 0 |
| 2001 | 30 | 1 |
| 2002 | 22 | 23 |
| 2003 | 17 | 24 |
| 2004 | 17 | 15 |
| 2005 | 16 | 20 |
| 2006 | 14 | 27 |
| 2007 | 17 | 26 |
| 2008 | 40 | 73 |
| 2009 | 21 | 38 |
| 2010 | 26 | 38 |
| 2011 | 38 | 41 |
| 2012 | 23 | 59 |
| 2013 | 48 | 61 |
| 2014 | 54 | 66 |
| 2015 | 55 | 72 |
| 2016 | 59 | 71 |
| 2017 | 43 | 73 |
| 2018 | 55 | 70 |
| 2019 | 84 | 48 |
| 2020 | 60 | 47 |
| 2021 | 58 | 52 |
| 2022 | 48 | 35 |
| 2023 | 32 | 27 |
| 2024 | 25 | 46 |
| 2025 | 26 | 27 |
| 2026 | 26 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21C 35/18Mining picks893
- E21C 35/22Equipment for preventing the formation of, or for removal of, dust166
- E21C 35/302Measuring, signaling or indicating specially adapted for machines for slitting or completely163
- E21C 35/20General features of equipment for removal of chippings158
- E21C 35/08Guiding the machine145
- E21C 35/282Autonomous machines123
- E21C 35/24Remote control specially adapted for machines for slitting or completely freeing the91
- E21C 35/04Safety devices80
Recent patents
- Non-rotating bit for cutting tool22 Sep 2026US 12,741,396 B2Caterpillar Paving Products Inc.
- Underground mine energy management system4 Aug 2026US 12,697,896 B2Caterpillar Inc.
- Bit holder insertion and extraction system28 Jul 2026US 12,692,789 B1The Sollami Company
- Tunneling system28 Jul 2026US 12,692,790 B2Ccteg Taiyuan Research Institute
- Block for holding a cutting bit21 Jul 2026US 12,687,111 B2Kennametal Inc.
- Monitoring system for excavation equipment8 Oct 2026US 2026/0311313 A1Tesmec S.P.A.
- Pavement grinding drum having modular bit mountings13 Aug 2026US 2026/0234878 A1Graco Minnesota Inc.
- Pick tool13 Aug 2026US 2026/0235028 A1Element Six Limited
- Wellbore controllable chamber-forming granular-flow mining system6 Aug 2026US 2026/0226817 A1Blueland Technology Limited
- 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.
Most cited
By later US patents
- Embossed washer182US 6,824,225 B2Kennametal Inc. · 2004
- Mining machine bit and mounting thereof178US 4,201,421 A1980
- Tool comprised of a holder body and a hard insert and method of using same177US 5,417,475 ASandvik AB · 1995
- Replaceable wear surface for bit support172US 6,692,083 B2Keystone Engineering & Manufacturing Corporation · 2004
- Protective wear sleeve having tapered lock and retainer172US 6,786,557 B2Kennametal Inc. · 2004