E21F 15/08
Filling-up hydraulically or pneumatically
Official title: Filling-up hydraulically or pneumatically (hydraulic or pneumatic transport devices B65G; pipes, pipe couplings F16L)
E21F15/08 (Filling-up hydraulically or pneumatically) appears on 46 US grants and 32 published applications in this corpus.
Search patents in E21F- Granted patents
- 46
- Published applications
- 32
- Assignees
- 32
- Inventors
- 118
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 2 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 2 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 2 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 2 |
| 2018 | 2 | 0 |
| 2019 | 0 | 4 |
| 2020 | 4 | 4 |
| 2021 | 2 | 3 |
| 2022 | 3 | 1 |
| 2023 | 3 | 3 |
| 2024 | 3 | 4 |
| 2025 | 2 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Automated method and processing train for lining tunnels21 Apr 2026US 12,607,122 B2Hinfra S.R. L.
- Methods for grout injection repair and water retention in goaf16 Sep 2025US 12,416,237 B1China University of Mining and Technology
- Systems and methods for subterranean energy storage8 Apr 2025US 12,270,368 B2
- Underground mining methods via boreholes and multilateral blast-holes24 Sep 2024US 12,098,636 B2
- Isolated overburden grouting filling method for coal gangue underground emission reduction23 Jul 2024US 12,044,125 B2China University of Mining and Technology
- Methods, devices, and storage medium for synchronous treatment of water hazard and subsidence25 Jun 2026US 2026/0176970 A1China University of Mining and Technology, Beijing
- Underground mining methods via boreholes and multilateral blast-holes4 Apr 2024US 2024/0110478 A1
- Isolated overburden grouting filling method for coal gangue underground emission reduction28 Mar 2024US 2024/0102343 A1China University of Mining and Technology
- Plug for a Void, System and Method21 Mar 2024US 2024/0093607 A1Strata Products Worldwide, LLC
- Automated method and processing train for lining tunnels15 Feb 2024US 2024/0052743 A1Hinfra S.R. L.
Most cited
By later US patents
- System and method for aggregate disposal65US 8,366,349 B2Beachner Construction Company, Inc. · 2013
- Method and system for underground gasification of coal or browncoal42US 5,287,926 A1994
- Methods of stowing cavities with flowable materials26US 4,357,167 ACoal Industry (Patents) Limited · 1982
- Tunnel support structure and method18US 4,072,018 A1978
- Backfilling in mines16US 5,141,365 AFosroc International Limited · 1992