F04D 29/2216
Shape, geometry
Official title: {Shape, geometry (F04D29/2211 takes precedence)}
F04D29/2216 (Shape, geometry) appears on 138 US grants and 135 published applications in this corpus.
Search patents in F04D- Granted patents
- 138
- Published applications
- 135
- Assignees
- 108
- Inventors
- 303
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 2 |
| 2002 | 3 | 2 |
| 2003 | 2 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 2 |
| 2007 | 0 | 1 |
| 2008 | 2 | 3 |
| 2009 | 0 | 3 |
| 2010 | 0 | 1 |
| 2011 | 1 | 2 |
| 2012 | 1 | 2 |
| 2013 | 4 | 4 |
| 2014 | 1 | 6 |
| 2015 | 2 | 8 |
| 2016 | 1 | 7 |
| 2017 | 7 | 7 |
| 2018 | 8 | 8 |
| 2019 | 7 | 10 |
| 2020 | 9 | 8 |
| 2021 | 11 | 11 |
| 2022 | 13 | 11 |
| 2023 | 9 | 6 |
| 2024 | 10 | 13 |
| 2025 | 8 | 8 |
| 2026 | 7 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of designing single-channel pump and single-channel pump25 Aug 2026US 12,716,425 B2Korea Institute of Industrial Technology
- Impeller pump and method26 May 2026US 12,638,021 B2Pentair Flow Technologies, LLC
- Submersible pump with external slicer19 May 2026US 12,631,185 B1
- Centrifugal pump stage with radiused impeller flow passage exit for reduced erosion28 Apr 2026US 12,612,848 B2Halliburton Energy Services.Inc.
- Centrifugal compressor impeller with nonlinear backwall28 Apr 2026US 12,612,923 B1Ingersoll-Rand Industrial U.S., Inc.
- Impeller pump and method24 Sep 2026US 2026/0286970 A1Pentair Flow Technologies, LLC
- Centrifugal compressor impeller with nonlinear backwall13 Aug 2026US 2026/0235138 A1
- Pump system30 Jul 2026US 2026/0218719 A1Pentair Flow Technologies, LLC
- Pump9 Jul 2026US 2026/0194065 A1Ebara Corporation
- Centrifugal compressor impeller with nonlinear backwall30 Apr 2026US 2026/0117788 A1Ingersoll-Rand Industrial U.S., Inc.
Most cited
By later US patents
- Submerisble molten metal pump157US 5,203,681 A1993
- Submersible molten metal pump143US 5,330,328 A1994
- Molten metal pump with vaned impeller143US 5,634,770 AMetaullics Systems Co., L.P. · 1997
- Molten metal pump with vaned impeller138US 5,586,863 AMetaullics Systems Co., L.P. · 1996
- Molten metal pump with vaned impeller129US 5,470,201 AMetaullics Systems Co., L.P. · 1995