F04D 29/104
The sealing fluid being other than the working fluid or being the
Official title: {the sealing fluid being other than the working fluid or being the working fluid treated}
F04D29/104 (The sealing fluid being other than the working fluid or being the) appears on 78 US grants and 86 published applications in this corpus.
Search patents in F04D- Granted patents
- 78
- Published applications
- 86
- Assignees
- 67
- Inventors
- 203
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 3 |
| 2008 | 1 | 2 |
| 2009 | 0 | 5 |
| 2010 | 2 | 2 |
| 2011 | 1 | 2 |
| 2012 | 4 | 4 |
| 2013 | 1 | 5 |
| 2014 | 2 | 2 |
| 2015 | 4 | 2 |
| 2016 | 4 | 5 |
| 2017 | 1 | 8 |
| 2018 | 3 | 8 |
| 2019 | 8 | 5 |
| 2020 | 7 | 5 |
| 2021 | 3 | 5 |
| 2022 | 8 | 6 |
| 2023 | 1 | 2 |
| 2024 | 4 | 6 |
| 2025 | 3 | 5 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electric centrifugal compressor8 Sep 2026US 12,729,690 B2Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- High pressure gas sealing23 Jun 2026US 12,663,015 B2Dover Pumps & Process Solutions Segment, Inc.
- Contamination prevention in the blower of a ventilator2 Jun 2026US 12,642,928 B2Loewenstein Medical Technology S.A.
- Hydrogen gas transfer system28 Apr 2026US 12,613,003 B2Kawasaki Jukogyo Kabushiki Kaisha
- Submersible well fluid system25 Nov 2025US 12,480,390 B2FMC Technologies, Inc.
- A method of protecting turbine shaft bearings used in anaesthesia devices from contaminants in patient gases18 Jun 2026US 2026/0166247 A1Peninsula Medical Technologies Ltd
- Seal leak gas recovery system using an ejector and method25 Dec 2025US 2025/0389201 A1Nuovo Pignone Tecnologie Srl
- Compression system with gas leak recovery and fuel cells, and method14 Aug 2025US 2025/0260028 A1Nuovo Pignone Tecnologie Srl
- System having a gas seal and method for operating the system3 Apr 2025US 2025/0109797 A1Siemens Energy Global GmbH & Co. KG
- High pressure gas sealing13 Mar 2025US 2025/0084863 A1Dover Pumps & Process Solutions Segment, Inc.
Most cited
By later US patents
- Thermal control system for gas-bearing turbocompressors72US 6,231,302 B12001
- Methods of generating and utilizing utility gas46US 8,906,138 B2ExxonMobil Upstream Research Company · 2014
- Lubricating and oil seal system for a high speed compressor39US 3,976,165 ANorwalk-Turbo, Inc. · 1976
- Gas compression system and method utilizing gas seal control37US 6,394,764 B1Dresser-Rand Company · 2002
- Compressor system and method of operation35US 5,382,141 AKvaener Rosenberg a.s. Kvaerner Subsea Contracting · 1995