F04F 9/00
Diffusion pumps
F04F9/00 (Diffusion pumps) appears on 37 US grants and 21 published applications in this corpus.
Search patents in F04F- Granted patents
- 37
- Published applications
- 21
- Assignees
- 28
- Inventors
- 63
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 2 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 3 |
| 2020 | 0 | 0 |
| 2021 | 2 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 2 |
| 2025 | 0 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hybrid gettering diffusion pump8 Sep 2026US 12,729,670 B2Helion Energy, Inc.
- Vacuum ejector pump20 Jan 2026US 12,529,386 B2Vtec Co., Ltd.
- Energy-saving pump and control system for the pump28 Dec 2021US 11,208,993 B2
- Electrochemical hydrogen pump and method for operating electrochemical hydrogen pump7 Dec 2021US 11,192,064 B2Panasonic Intellectual Property Management Co., Ltd.
- Diffusion pump to supply heat from a condenser to a heating element2 Jul 2019US 10,337,531 B2Leybold Aktiengesellschaft
- Diffusion pump16 Jul 2026US 2026/0204437 A1Kyoto Fusioneering Ltd.
- Vacuum ejector pump9 Oct 2025US 2025/0314259 A1Vtec Co., Ltd.
- Compressor26 Sep 2024US 2024/0318668 A1Panasonic Intellectual Property Management Co., Ltd.
- Hybrid Gettering Diffusion Pump25 Apr 2024US 2024/0136165 A1Helion Energy, Inc.
- Guide device, coolant duct and diffusion vacuum pump12 Oct 2023US 2023/0323899 A1
Most cited
By later US patents
- Vacuum trap388US 9,057,388 B2International Business Machines Corporation · 2015
- Generation of high vacuums67US 4,172,477 ALeybold-Heraeus GmbH · 1979
- Hydrogen pump26US 4,886,048 A1989
- Dual inlet vacuum pumps24US 6,193,461 B1Varian, Inc. · 2001
- Method and apparatus for electrically heating a fluid21US 3,943,330 AUnited Kingdom Atomic Energy Authority · 1976