F04C 2220/12
Dry running
F04C2220/12 (Dry running) appears on 90 US grants and 122 published applications in this corpus.
Search patents in F04C- Granted patents
- 90
- Published applications
- 122
- Assignees
- 66
- Inventors
- 253
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 2 |
| 2002 | 4 | 3 |
| 2003 | 3 | 2 |
| 2004 | 2 | 4 |
| 2005 | 2 | 7 |
| 2006 | 2 | 12 |
| 2007 | 2 | 5 |
| 2008 | 2 | 11 |
| 2009 | 2 | 1 |
| 2010 | 4 | 6 |
| 2011 | 3 | 1 |
| 2012 | 0 | 8 |
| 2013 | 3 | 2 |
| 2014 | 3 | 1 |
| 2015 | 3 | 3 |
| 2016 | 2 | 1 |
| 2017 | 2 | 4 |
| 2018 | 1 | 5 |
| 2019 | 2 | 6 |
| 2020 | 4 | 9 |
| 2021 | 4 | 6 |
| 2022 | 5 | 8 |
| 2023 | 5 | 3 |
| 2024 | 4 | 3 |
| 2025 | 3 | 3 |
| 2026 | 1 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Vacuum pump assembly with improved process by-product holding capacity1 Sep 2026US 12,723,588 B2Beijing Grand Hitek. Co., Ltd.
- Floating-type oil-free vacuum scroll compressor23 Dec 2025US 12,504,013 B2Shenyang Canta Medical Tech. Co., Ltd.
- Element, device and method for compression of a gas to be compressed having a low temperature3 Jun 2025US 12,320,358 B2Atlas Copco Airpower, Naamloze Vennootschap
- Cam ring and plate module for vehicle vacuum pumps, and method of manufacturing the same27 May 2025US 12,312,664 B2Hyundai Motor Company
- System and method for treating exhaust fluid from semiconductor manufacturing equipment31 Dec 2024US 12,179,147 B2Plan Co., Ltd
- Vacuum pump20 Aug 2026US 2026/0243257 A1Pfeiffer Vacuum GmbH
- Pump and method of manufacturing a sealing23 Jul 2026US 2026/0210357 A1Pfeiffer Vacuum Technology AG
- Cleaning method for dry vacuum pump and cleaning device for dry vacuum pump23 Jul 2026US 2026/0210381 A1Kanken Techno Co., Ltd.
- Centrifugal oil pump device for a vacuum pump11 Jun 2026US 2026/0160252 A1Edwards Limited
- Vacuum exhaust system and cleaning method5 Mar 2026US 2026/0062800 A1Edwards Japan Limited
Most cited
By later US patents
- Two stage screw type vacuum pump with motor in-between the stages140US 5,846,062 AEbara Corporation · 1998
- Evacuating apparatus40US 5,709,537 AMatsushita Electric Industrial Co., Ltd. · 1998
- Partition means for directing air flow over a cooler in an oilless scroll compressor22US 6,210,132 B1Hitachi, Ltd. · 2001
- Two stage dry primary pump20US 5,040,949 AAlcatel Cit · 1991
- Scroll-type compressor and method of assembling the same16US 5,556,269 AHitachi, Ltd. · 1996