F04D 29/02
Selection of particular materials
Official title: Selection of particular materials (for handling specific liquids F04D7/00 {F04D23/001})
F04D29/02 (Selection of particular materials) appears on 1,756 US grants and 2,180 published applications in this corpus.
Search patents in F04D- Granted patents
- 1,756
- Published applications
- 2,180
- Assignees
- 784
- Inventors
- 4,274
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 9 | 0 |
| 1989 | 9 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 12 | 0 |
| 1996 | 6 | 0 |
| 1997 | 12 | 0 |
| 1998 | 15 | 0 |
| 1999 | 16 | 0 |
| 2000 | 23 | 0 |
| 2001 | 24 | 5 |
| 2002 | 24 | 19 |
| 2003 | 29 | 25 |
| 2004 | 19 | 42 |
| 2005 | 18 | 42 |
| 2006 | 24 | 36 |
| 2007 | 21 | 42 |
| 2008 | 24 | 56 |
| 2009 | 24 | 49 |
| 2010 | 27 | 72 |
| 2011 | 30 | 84 |
| 2012 | 52 | 67 |
| 2013 | 47 | 102 |
| 2014 | 70 | 104 |
| 2015 | 35 | 111 |
| 2016 | 61 | 144 |
| 2017 | 90 | 169 |
| 2018 | 103 | 170 |
| 2019 | 158 | 127 |
| 2020 | 170 | 140 |
| 2021 | 116 | 94 |
| 2022 | 105 | 95 |
| 2023 | 101 | 120 |
| 2024 | 112 | 100 |
| 2025 | 76 | 77 |
| 2026 | 52 | 88 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Water based coating composition for wind blades29 Sep 2026US 12,747,370 B2Hempel A/S
- Axial pump and riser18 Aug 2026US 12,710,044 B2Molten Metal Equipment Innovations, LLC
- Electric coolant pump with expansion compensating seal18 Aug 2026US 12,710,051 B2Multi Parts Supply USA, Inc.
- Fan device with metal annular frame18 Aug 2026US 12,710,055 B2Cooler Master Co., Ltd.
- Liquid pump permanent magnet rotor with plastic insert and channel arrangement14 Jul 2026US 12,680,548 B2Bühler Motor GmbH
- Pump Assembly1 Oct 2026US 2026/0298263 A1KSB SE & Co. KGaA
- Canned motor pump and fuel cell comprising the same24 Sep 2026US 2026/0286967 A1Zhongshan H2 Forest Technology Co., Ltd.
- Rotor for a fluid pump, and method and mold for manufacturing same24 Sep 2026US 2026/0286968 A1Ecp Entwicklungsgesellschaft Mbh
- Pump arrangement24 Sep 2026US 2026/0286983 A1ECP Entwicklungsgesselschaft mbH
- Submersible pump with stage erosion control17 Sep 2026US 2026/0275989 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Expandable impeller pump391US 7,393,181 B2Datascope Investment Corp. · 2008
- Compact low noise efficient blower for CPAP devices351US 7,866,944 B2ResMed Motor Technologies Inc. · 2011
- Expandable impeller pump296US 7,927,068 B2The Penn State Research Foundation · 2011
- Expandable impeller pump197US 8,376,707 B2The Penn State Research Foundation · 2013
- Vibration isolating seal for mounting fans and blowers154US 4,568,243 ABarry Wright Corporation · 1986