E21D 20/025
Grouting with organic components
Official title: {Grouting with organic components, e.g. resin}
E21D20/025 (Grouting with organic components) appears on 222 US grants and 112 published applications in this corpus.
Search patents in E21D- Granted patents
- 222
- Published applications
- 112
- Assignees
- 112
- Inventors
- 350
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 7 | 0 |
| 1978 | 4 | 0 |
| 1979 | 7 | 0 |
| 1980 | 8 | 0 |
| 1981 | 15 | 0 |
| 1982 | 8 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 12 | 0 |
| 1986 | 4 | 0 |
| 1987 | 9 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 7 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 1 |
| 2002 | 4 | 1 |
| 2003 | 3 | 4 |
| 2004 | 1 | 1 |
| 2005 | 1 | 3 |
| 2006 | 5 | 3 |
| 2007 | 1 | 4 |
| 2008 | 2 | 3 |
| 2009 | 3 | 5 |
| 2010 | 5 | 5 |
| 2011 | 1 | 5 |
| 2012 | 1 | 10 |
| 2013 | 6 | 7 |
| 2014 | 4 | 5 |
| 2015 | 7 | 9 |
| 2016 | 3 | 1 |
| 2017 | 5 | 2 |
| 2018 | 1 | 4 |
| 2019 | 3 | 2 |
| 2020 | 3 | 7 |
| 2021 | 6 | 7 |
| 2022 | 5 | 2 |
| 2023 | 4 | 10 |
| 2024 | 3 | 5 |
| 2025 | 7 | 4 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Drilling and bolting tool18 Aug 2026US 12,709,981 B2Joy Global Underground Mining LLC
- Tunnel constraint anchor cable and method for improving stability of initial support structure14 Jul 2026US 12,680,451 B2Chang An University
- Active control method and device for large deformation of deep thin-bedded surrounding rock9 Jun 2026US 12,650,076 B2Huaneng Lancang River Hydropower Inc.
- Bolter2 Jun 2026US 12,644,385 B2Joy Global Underground Mining LLC
- Drill head injection system for a self-drilling rock bolt assembly10 Mar 2026US 12,571,309 B2Oka Rock Bolt Technologies Pty Limited
- Bolter24 Sep 2026US 2026/0286845 A1Joy Global Underground Mining LLC
- Drill Head Injection System for a Self-Drilling Rock Bolt Assembly10 Sep 2026US 2026/0266179 A1Oka Rock Bolt Technologies Pty Limited
- Rock bolt installation2 Oct 2025US 2025/0305416 A1Sandvik Mining and Construction Australia (Production/Supply) Pty Ltd
- A method of installing a cable bolt, a system and components of same4 Sep 2025US 2025/0277449 A1
- Bolter14 Aug 2025US 2025/0257658 A1Joy Global Underground Mining LLC
Most cited
By later US patents
- Organic grouting composition for anchoring a bolt in a hole60US 4,280,943 AE. I. Du Pont de Nemours and Company · 1981
- Squirt cartridge for mixing and dispensing a two-component mass56US 4,676,406 AUpat GmbH & Co. · 1987
- Post tensionable grouted anchor assembly53US 4,295,761 AStratabolt Corporation · 1981
- Resin reinforced expansion anchor system42US 4,764,055 ABirmingham Bolt Company · 1988
- Method for anchoring a bolt in a rock-like structure38US 4,564,315 A1986