E21D 20/023
Cartridges
Official title: {Cartridges; Grouting charges}
E21D20/023 (Cartridges) appears on 37 US grants and 10 published applications in this corpus.
Search patents in E21D- Granted patents
- 37
- Published applications
- 10
- Assignees
- 23
- Inventors
- 55
- Latest grant
- 21 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 2 |
| 2017 | 1 | 1 |
| 2018 | 3 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Chemical fastening method with an inorganic mortar system having aluminous cement and hard aggregate with mohs-hardness greater than or equal to 821 Jan 2025US 12,202,772 B2Hilti Aktiengesellschaft
- Anchoring systems for mines20 Nov 2018US 10,132,165 B2Terrasimco Inc.
- Arrangement and method for positioning cartridges for a rock grouting equipment28 Aug 2018US 10,060,260 B2Epiroc Rock Drills Aktiebolag
- Method of supporting a rock wall29 May 2018US 9,982,537 B2Ncm Innovations (Pty) Ltd.
- Device, method and system for loading fixatives for rock bolts15 Aug 2017US 9,732,614 B2Gazmick Pty Ltd
- Anchor Arrangement17 Oct 2024US 2024/0344457 A1Mohlalefi (Pty) Ltd.
- Use of at least one hard aggregate having a mohs-hardness of greater than or equal to 8 in an inorganic mortar system based on aluminous cement to increase load values23 Feb 2023US 2023/0059102 A1Hilti Aktiengesellschaft
- Method of supporting a rock wall30 Nov 2017US 2017/0342836 A1Ncm Innovations (Pty) Ltd.
- Multiple-point anchored rock bolt23 Jun 2016US 2016/0177718 A1Ncm Innovations (Pvt) Ltd
- Arrangement And Method For Positioning Cartridges For A Rock Grouting Equipment28 Apr 2016US 2016/0115789 A1Atlas Copco Rock Drills AB
Most cited
By later US patents
- Inorganic cement grouting system for use in anchoring a bolt in a hole and compartmented package for use therewith34US 4,126,005 AE. I. Du Pont de Nemours and Company · 1978
- Cartridge for grouting an anchor element in a hole of a support structure32US 4,096,944 AThe United States of America as represented by the Secretary of the Interior · 1978
- Reactivatable set-inhibited cementitious compositions29US 4,455,171 ASociete Anonyme d'Explosifs et de Produits Chimiques · 1984
- High-early-strength phosphate grouting system for use in anchoring a bolt in a hole27US 4,174,227 AE. I. Du Pont de Nemours and Company · 1979
- Inorganic cement grouting system for use in anchoring a bolt in a hole22US 4,127,001 AE. I. Du Pont de Nemours and Company · 1978