F17C 2270/0142
Placed underground
Official title: placed underground
F17C2270/0142 (Placed underground) appears on 175 US grants and 194 published applications in this corpus.
Search patents in F17C- Granted patents
- 175
- Published applications
- 194
- Assignees
- 131
- Inventors
- 396
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 2 |
| 2002 | 5 | 1 |
| 2003 | 2 | 5 |
| 2004 | 3 | 4 |
| 2005 | 6 | 7 |
| 2006 | 4 | 10 |
| 2007 | 2 | 3 |
| 2008 | 3 | 5 |
| 2009 | 1 | 4 |
| 2010 | 3 | 1 |
| 2011 | 1 | 6 |
| 2012 | 1 | 4 |
| 2013 | 3 | 2 |
| 2014 | 1 | 12 |
| 2015 | 4 | 15 |
| 2016 | 9 | 14 |
| 2017 | 5 | 4 |
| 2018 | 3 | 7 |
| 2019 | 13 | 4 |
| 2020 | 8 | 7 |
| 2021 | 6 | 8 |
| 2022 | 6 | 9 |
| 2023 | 9 | 18 |
| 2024 | 11 | 17 |
| 2025 | 15 | 16 |
| 2026 | 9 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Compressed gas storage tank, system and method22 Sep 2026US 12,742,516 B2Ardent Underground Pty Ltd
- Foot frame bottom plate type fixed parts, sealed inner lining structure, underground chamber and construction method15 Sep 2026US 12,735,854 B2Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
- Hydrogen fuel storage and delivery method to power aircraft1 Sep 2026US 12,723,715 B2Green Grid Inc.
- Underground storage system for fluid storage2 Jun 2026US 12,644,564 B2Vallourec Oil and Gas France
- Method of enhancing methane storage capacity in salt caverns28 Apr 2026US 12,612,254 B2Saudi Arabian Oil Company
- Electric field-enhanced underground hydrogen storage system and method17 Sep 2026US 2026/0276147 A1China University of Petroleum (East China)
- Process for storing and exploiting a first gas and a second gas denser than the first gas in an aquifer or depleted reservoir27 Aug 2026US 2026/0251265 A1Storengy
- Underground Gas Storage Device for Compressed Air Energy Storage and Construction Method Thereof2 Jul 2026US 2026/0185662 A1Shanghai Investigation, Design & Research Institute Co., Ltd.
- Relief valve protector25 Jun 2026US 2026/0177210 A1
- Deep underground hydrogen storage structure and its construction method21 May 2026US 2026/0139795 A1Wsgri Engineering & Surveying Incorporation Limited
Most cited
By later US patents
- Compressed-air storage installation100US 4,147,204 ABBC Brown, Boveri & Company, Limited · 1979
- Ship based gas transport system57US 5,839,383 AEnron LNG Development Corp. · 1998
- Underground compressed natural gas storage and service system50US 5,207,530 AHalliburton Company · 1993
- Safety device for underground storage of liquefied gas49US 4,417,829 ASociete Francaise de Stockage Geologique "Goestock" · 1983
- Method for producing, transporting, offloading, storing and distributing natural gas to a marketplace44US 6,298,671 B1BP Amoco Corporation · 2001