F04F 9/04
In combination with fore pumps
Official title: in combination with fore pumps, e.g. use of isolating valves
F04F9/04 (In combination with fore pumps) appears on 5 US grants and 2 published applications in this corpus.
Search patents in F04F- Granted patents
- 5
- Published applications
- 2
- Assignees
- 5
- Inventors
- 9
- Latest grant
- 2 Jul 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 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 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Diffusion pump to supply heat from a condenser to a heating element2 Jul 2019US 10,337,531 B2Leybold Aktiengesellschaft
- Vapor jet pump with ejector stage in foreline27 Jul 2004US 6,767,192 B2Varian, Inc.
- Generation of high vacuums30 Oct 1979US 4,172,477 ALeybold-Heraeus GmbH
- Combined vacuum baffle and valve for diffusion pump28 Mar 1978US 4,081,222 AFinnigan Corporation
- Pumping unit for television tubes31 Jan 1978US 4,071,058 ACompagnie Industrielle des Telecommunications Clt-Alcatel S.A.
Most cited
By later US patents
- Generation of high vacuums67US 4,172,477 ALeybold-Heraeus GmbH · 1979
- Pumping unit for television tubes3US 4,071,058 ACompagnie Industrielle des Telecommunications Clt-Alcatel S.A. · 1978
- Vapor jet pump with ejector stage in foreline2US 6,767,192 B2Varian, Inc. · 2004
- Combined vacuum baffle and valve for diffusion pump1US 4,081,222 AFinnigan Corporation · 1978