F15B 21/06
Use of special fluids
Official title: Use of special fluids, e.g. liquid metal; Special adaptations of fluid-pressure systems, or control of elements therefor, to the use of such fluids
F15B21/06 (Use of special fluids) appears on 153 US grants and 128 published applications in this corpus.
Search patents in F15B- Granted patents
- 153
- Published applications
- 128
- Assignees
- 105
- Inventors
- 298
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 0 |
| 2002 | 5 | 3 |
| 2003 | 4 | 8 |
| 2004 | 3 | 2 |
| 2005 | 4 | 8 |
| 2006 | 2 | 0 |
| 2007 | 1 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 4 |
| 2010 | 2 | 8 |
| 2011 | 3 | 2 |
| 2012 | 3 | 6 |
| 2013 | 2 | 4 |
| 2014 | 3 | 3 |
| 2015 | 7 | 2 |
| 2016 | 2 | 3 |
| 2017 | 2 | 8 |
| 2018 | 7 | 5 |
| 2019 | 5 | 5 |
| 2020 | 5 | 9 |
| 2021 | 6 | 8 |
| 2022 | 12 | 13 |
| 2023 | 17 | 13 |
| 2024 | 10 | 6 |
| 2025 | 8 | 4 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydraulically amplified self-healing electrostatic (HASEL) transducers10 Feb 2026US 12,546,342 B2The Regents of the University of Colorado, a body corporate
- Telescoping shear thickening fluid based object control mechanism11 Nov 2025US 12,467,486 B2Moshun, LLC
- Artificial muscles comprising a partially insulated electrode pair and methods for optimizing voltage polarity conditions in the artificial muscles2 Sep 2025US 12,403,588 B2Toyota Motor Engineering & Manufacturing North America, Inc.
- Artificial muscle assemblies including a central artificial muscle and a plurality of initiating actuators15 Jul 2025US 12,362,684 B2Toyota Motor Engineering & Manufacturing North America, Inc.
- High strain peano hydraulically amplified self-healing electrostatic (HASEL) transducers13 May 2025US 12,297,851 B2The Regents of the University of Colorado, a body corporate
- Integrated hydro-electric actuation and thermal management system with distributed electrolytic energy storage4 Jun 2026US 2026/0151899 A1
- Piston-type gas-powered well-based energy storage and power generation system18 Dec 2025US 2025/0382979 A1
- Hydraulically amplified self-healing electrostatic (hasel) transducers20 Nov 2025US 2025/0354571 A1The Regents of the University of Colorado, a body corporate
- Magnetorheological fluid valve and variable manufacturing mold24 Jul 2025US 2025/0236051 A1Shoreline Design & Manufacturing LLC
- Hydraulically amplified self-healing electrostatic actuator22 May 2025US 2025/0163942 A1Electronics and Telecommunications Research Institute
Most cited
By later US patents
- Adjustable magneto-rheological fluid device103US 5,956,951 AMR Technologies · 1999
- Downhole actuation system utilizing electroactive fluids95US 6,568,470 B2Baker Hughes Incorporated · 2003
- Hydraulically energized magnetorheological replicant muscle tissue and a system and a method for using and controlling same80US 6,168,634 A2001
- Valve and position control using magnetorheological fluids74US 7,428,922 B2Halliburton Energy Services.Inc. · 2008
- Heterogeneous structure for accumulating or dissipating energy, methods of using such a structure and associated devices51US 6,052,992 AD L D International a part interest · 2000