F04B 15/02
The fluids being viscous or non-homogeneous
Official title: the fluids being viscous or non-homogeneous
F04B15/02 (The fluids being viscous or non-homogeneous) appears on 930 US grants and 1,015 published applications in this corpus.
Search patents in F04B- Granted patents
- 930
- Published applications
- 1,015
- Assignees
- 439
- Inventors
- 1,723
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 7 | 0 |
| 1978 | 7 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 8 | 0 |
| 1985 | 10 | 0 |
| 1986 | 11 | 0 |
| 1987 | 8 | 0 |
| 1988 | 8 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 7 | 0 |
| 1992 | 10 | 0 |
| 1993 | 6 | 0 |
| 1994 | 12 | 0 |
| 1995 | 6 | 0 |
| 1996 | 7 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 10 | 2 |
| 2002 | 11 | 6 |
| 2003 | 7 | 9 |
| 2004 | 8 | 8 |
| 2005 | 3 | 7 |
| 2006 | 8 | 15 |
| 2007 | 3 | 11 |
| 2008 | 5 | 13 |
| 2009 | 10 | 14 |
| 2010 | 7 | 23 |
| 2011 | 11 | 18 |
| 2012 | 10 | 27 |
| 2013 | 18 | 20 |
| 2014 | 13 | 26 |
| 2015 | 23 | 33 |
| 2016 | 13 | 42 |
| 2017 | 18 | 42 |
| 2018 | 29 | 48 |
| 2019 | 36 | 66 |
| 2020 | 44 | 87 |
| 2021 | 72 | 98 |
| 2022 | 92 | 110 |
| 2023 | 93 | 98 |
| 2024 | 101 | 85 |
| 2025 | 80 | 63 |
| 2026 | 43 | 44 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fluid pump assembly6 Oct 2026US 12,753,748 B2
- Fluid end block and fluid end for a multiplex piston pump having multiple inlet passages15 Sep 2026US 12,736,035 B2
- Transfer pump assembly8 Sep 2026US 12,729,669 B2Graco Minnesota Inc.
- Through-hardened valve seat for hydraulic fracturing1 Sep 2026US 12,723,662 B2Apex Industrial LLC
- Smoothing pump rate during transition18 Aug 2026US 12,710,031 B2Halliburton Energy Services.Inc.
- Active checked multiple displacer assembly1 Oct 2026US 2026/0298217 A1Graco Minnesota Inc.
- Through-Hardened Valve Seat for Hydraulic Fracturing1 Oct 2026US 2026/0298349 A1Apex Industrial LLC
- Electric drive device for the electric operation of a truck-mounted concrete pump, truck-mounted concrete pump and system for operating a truck-mounted concrete pump24 Sep 2026US 2026/0286730 A1
- Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods17 Sep 2026US 2026/0275845 A1BJ Energy Solutions, LLC
- Hybrid electric transmission for hydraulic fracturing17 Sep 2026US 2026/0275847 A1Iny LLC
Most cited
By later US patents
- Quintuplex mud pump319US 8,083,504 B2Weatherford/Lamb, Inc. · 2011
- Remote monitoring for hydraulic fracturing equipment248US 9,840,901 B2U.S. Well Services, LLC · 2017
- Over pressure relief system for fluid ends217US 10,082,137 B2Caterpillar Inc. · 2018
- Pump system and method of starting pump174US 10,221,856 B2BJ Services Company · 2019
- Multi-plunger pumps and associated drive systems172US 10,598,258 B2U.S. Well Services, LLC · 2020