F04C 2280/02
Preventing solid deposits in pumps
Official title: Preventing solid deposits in pumps, e.g. in vacuum pumps with chemical vapour deposition [CVD] processes
F04C2280/02 (Preventing solid deposits in pumps) appears on 37 US grants and 57 published applications in this corpus.
Search patents in F04C- Granted patents
- 37
- Published applications
- 57
- Assignees
- 35
- Inventors
- 120
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 7 |
| 2009 | 1 | 2 |
| 2010 | 1 | 3 |
| 2011 | 2 | 2 |
| 2012 | 0 | 2 |
| 2013 | 1 | 2 |
| 2014 | 1 | 3 |
| 2015 | 1 | 4 |
| 2016 | 1 | 3 |
| 2017 | 3 | 1 |
| 2018 | 2 | 2 |
| 2019 | 2 | 4 |
| 2020 | 2 | 5 |
| 2021 | 2 | 3 |
| 2022 | 3 | 2 |
| 2023 | 3 | 3 |
| 2024 | 2 | 1 |
| 2025 | 4 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Magnetic debris filter for compressor and compressor with magnetic debris filter19 Mar 2026US 2026/0078757 A1Mahle International GmbH
- Devices for compressing a gaseous fluid and method of operating a device for compressing a gaseous fluid12 Jun 2025US 2025/0188933 A1Hanon Systems
- Control Device for Hydraulic Control Valve27 Mar 2025US 2025/0101979 A1Hitachi Astemo, Ltd.
- Stator for a vacuum pump4 Jul 2024US 2024/0218877 A1Edwards Limited
Most cited
By later US patents
- Vacuum pumping apparatus8US 6,471,494 B1Aisin Seiki Kabushiki Kaisha · 2002
- Twin shaft vacuum pump with purge gas inlet6US 5,046,934 ALeybold Aktiengesellschaft · 1991
- Composite dry vacuum pump having roots and screw rotor5US 7,611,340 B2Lot Vacuum Co., Ltd. · 2009
- Roots pump4US 7,108,492 B2Kabushiki Kaisha Toyota Jidoshokki · 2006
- Eccentric bush assembly structure of scroll compressor3US 10,309,403 B2Hanon Systems · 2019