F04C 25/02
Adaptations of pumps for special use of pumps for elastic fluids: for
Official title: for producing high vacuum (sealing arrangements F04C27/00; silencing F04C29/06)
F04C25/02 (Adaptations of pumps for special use of pumps for elastic fluids: for) appears on 367 US grants and 498 published applications in this corpus.
Search patents in F04C- Granted patents
- 367
- Published applications
- 498
- Assignees
- 191
- Inventors
- 808
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 1 |
| 2003 | 3 | 4 |
| 2004 | 0 | 1 |
| 2005 | 0 | 7 |
| 2006 | 2 | 3 |
| 2007 | 2 | 5 |
| 2008 | 1 | 11 |
| 2009 | 4 | 7 |
| 2010 | 3 | 14 |
| 2011 | 2 | 9 |
| 2012 | 3 | 19 |
| 2013 | 14 | 20 |
| 2014 | 8 | 39 |
| 2015 | 17 | 33 |
| 2016 | 17 | 23 |
| 2017 | 25 | 33 |
| 2018 | 23 | 29 |
| 2019 | 18 | 36 |
| 2020 | 27 | 40 |
| 2021 | 21 | 42 |
| 2022 | 37 | 27 |
| 2023 | 37 | 35 |
| 2024 | 34 | 19 |
| 2025 | 23 | 19 |
| 2026 | 16 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Vacuum pump system42US 4,699,570 AITT Industries, Inc. · 1987
- Three stage scroll vacuum pump34US 9,028,230 B2Air Squared, Inc. · 2015
- Light-gas-isolation, oil-free, scroll vaccum-pump system25US 5,542,828 A1996
- Apparatus for the rapid evacuation of a vacuum chamber20US 6,004,109 ABalzers und Leybold Deutschland Holding AG · 1999
- Vacuum pump and method for generating sub-pressure20US 7,452,191 B2Piab AB · 2008