F04D 29/108
The sealing fluid being other than the working liquid or being the
Official title: {the sealing fluid being other than the working liquid or being the working liquid treated}
F04D29/108 (The sealing fluid being other than the working liquid or being the) appears on 107 US grants and 77 published applications in this corpus.
Search patents in F04D- Granted patents
- 107
- Published applications
- 77
- Assignees
- 86
- Inventors
- 227
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 4 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 1 | 3 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 1 | 1 |
| 2010 | 2 | 4 |
| 2011 | 1 | 1 |
| 2012 | 0 | 4 |
| 2013 | 3 | 2 |
| 2014 | 0 | 3 |
| 2015 | 3 | 5 |
| 2016 | 7 | 7 |
| 2017 | 2 | 6 |
| 2018 | 3 | 6 |
| 2019 | 6 | 4 |
| 2020 | 3 | 3 |
| 2021 | 3 | 1 |
| 2022 | 6 | 9 |
| 2023 | 2 | 1 |
| 2024 | 6 | 6 |
| 2025 | 4 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Seal configuration for high density lubrication oils7 Apr 2026US 12,595,805 B2Baker Hughes Oilfield Operations LLC
- Submersible well fluid system25 Nov 2025US 12,480,390 B2FMC Technologies, Inc.
- Gas seal column apparatus with sensor column28 Oct 2025US 12,454,956 B2Gscd Corp.
- Electric submersible pump systems29 Jul 2025US 12,371,978 B2Schlumberger Technology Corporation
- Gas seal column apparatus with sensor column14 Jan 2025US 12,196,212 B2Gscd Corp.
- Internally pressurized and lubricated shaft seals and bearings for pumps5 Mar 2026US 2026/0063134 A1Knuco 1, LLC
- Gas seal column apparatus with sensor column31 Jul 2025US 2025/0243866 A1Gscd Corp.
- Gas seal column apparatus with sensor column19 Dec 2024US 2024/0418173 A1Gscd Corp.
- Submersible pump12 Dec 2024US 2024/0410371 A1Sulzer Management AG
- Gas seal column apparatus26 Sep 2024US 2024/0318657 A1Gscd Corp.
Most cited
By later US patents
- Cardiac assist pump with steady rate supply of fluid lubricant443US 4,927,407 ARegents of the University of Minnesota · 1990
- Anti-thrombogenic blood pump338US 4,704,121 ANimbus, Inc. · 1987
- Centrifugal blood pump for cardiac assist307US 4,135,253 AMedtronic, Inc. · 1979
- Fluid motor driven blood pump236US 5,145,333 AThe Cleveland Clinic Foundation · 1992
- Viscous seal blood pump142US 5,098,256 AThe Cleveland Clinic Foundation · 1992