F04D 29/2227
For special materials
Official title: {for special materials}
F04D29/2227 (For special materials) appears on 83 US grants and 85 published applications in this corpus.
Search patents in F04D- Granted patents
- 83
- Published applications
- 85
- Assignees
- 74
- Inventors
- 214
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 6 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 4 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 4 |
| 2009 | 0 | 2 |
| 2010 | 0 | 4 |
| 2011 | 3 | 3 |
| 2012 | 3 | 4 |
| 2013 | 4 | 6 |
| 2014 | 1 | 3 |
| 2015 | 1 | 8 |
| 2016 | 5 | 5 |
| 2017 | 5 | 7 |
| 2018 | 5 | 6 |
| 2019 | 4 | 6 |
| 2020 | 4 | 5 |
| 2021 | 5 | 3 |
| 2022 | 5 | 2 |
| 2023 | 3 | 3 |
| 2024 | 3 | 3 |
| 2025 | 4 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Composite cross-over diffuser for a centrifugal pump, centrifugal pump comprising the same and corresponding manufacturing process9 Jun 2026US 12,650,131 B2Waterax Inc.
- Method for manufacturing an impeller30 Dec 2025US 12,508,653 B2Cryostar SAS
- Mechanism for maintaining integrity of permanent magnets in directly driven sealless pumps and turbines25 Nov 2025US 12,480,519 B2Flowserve Pte. Ltd.
- Rotors for use in caustic environments4 Nov 2025US 12,460,649 B2Vapotherm, Inc.
- Centrifugal pump for conveying media containing solids26 Aug 2025US 12,398,724 B2KSB SE & Co. KGaA
- Stage-by-stage hydraulic design method for impellers of multistage gasliquid multiphase pump20 Aug 2026US 2026/0244813 A1Jiangsu University
- Mechanism for maintaining integrity of permanent magnets in directly driven sealless pumps and turbines10 Jul 2025US 2025/0226711 A1Flowserve Pte. Ltd.
- Method for manufacturing an impeller29 May 2025US 2025/0170652 A1Cryostar SAS
- Composite Impeller and Methods of Forming Same and of Forming Molded Composite Articles27 Feb 2025US 2025/0067272 A1Greene, Tweed Technologies, Inc.
- Composite cross-over diffuser for a centrifugal pump, centrifugal pump comprising the same and corresponding manufacturing process31 Oct 2024US 2024/0360840 A1Waterax Inc.
Most cited
By later US patents