F04C 29/0092
Removing solid or liquid contaminants from the gas under pumping
Official title: {Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning}
F04C29/0092 (Removing solid or liquid contaminants from the gas under pumping) appears on 169 US grants and 175 published applications in this corpus.
Search patents in F04C- Granted patents
- 169
- Published applications
- 175
- Assignees
- 108
- Inventors
- 393
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 2 |
| 2002 | 7 | 7 |
| 2003 | 5 | 7 |
| 2004 | 3 | 6 |
| 2005 | 4 | 2 |
| 2006 | 6 | 10 |
| 2007 | 1 | 2 |
| 2008 | 1 | 6 |
| 2009 | 2 | 3 |
| 2010 | 5 | 4 |
| 2011 | 4 | 2 |
| 2012 | 3 | 5 |
| 2013 | 2 | 10 |
| 2014 | 4 | 5 |
| 2015 | 4 | 8 |
| 2016 | 5 | 6 |
| 2017 | 10 | 11 |
| 2018 | 7 | 13 |
| 2019 | 9 | 9 |
| 2020 | 18 | 14 |
| 2021 | 5 | 4 |
| 2022 | 6 | 8 |
| 2023 | 7 | 8 |
| 2024 | 9 | 7 |
| 2025 | 10 | 8 |
| 2026 | 6 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Screw compressor14 Jul 2026US 12,680,545 B2Hitachi, Ltd.
- Oil separator for compressor and compressor with oil separator12 May 2026US 12,624,695 B2Mahle International GmbH
- Control device for hydraulic control valve28 Apr 2026US 12,612,912 B2Hitachi Astemo, Ltd.
- Assembly for compressing gas having a housing comprising coolers in a central section, method for cooling, and use of such an assembly3 Mar 2026US 12,565,881 B2Atlas Copco Airpower, Naamloze Vennootschap
- Systems and methods for water removal in compressors3 Feb 2026US 12,539,491 B2Doosan Bobcat North America, Inc.
- Pump8 Oct 2026US 2026/0309152 A1Gebr. Becker GmbH
- Vacuum pump20 Aug 2026US 2026/0243257 A1Pfeiffer Vacuum GmbH
- Gas Compressor20 Aug 2026US 2026/0243258 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Cleaning method for dry vacuum pump and cleaning device for dry vacuum pump23 Jul 2026US 2026/0210381 A1Kanken Techno Co., Ltd.
- Blower9 Jul 2026US 2026/0194058 A1Atlas Copco (Wuxi) Compressor Co., Ltd.
Most cited
By later US patents
- Surgical evacuation system with a communication circuit for communication between a filter and a smoke evacuation device165US 10,898,622 B2Ethicon, Inc. · 2021
- Dual in-series large and small droplet filters67US 11,045,591 B2Cilag GmbH International · 2021
- Refrigerating apparatus58US 6,240,736 B1Hitachi, Ltd. · 2001
- Screw type vacuum pump with introduced inert gas37US 4,984,974 AHitachi, Ltd. · 1991
- High displacement rate, scroll-type, fluid handling apparatus36US 5,616,015 AVarian Associates, Inc. · 1997