F04B 11/0083
The pistons having different cross-sections
Official title: {the pistons having different cross-sections}
F04B11/0083 (The pistons having different cross-sections) appears on 19 US grants and 9 published applications in this corpus.
Search patents in F04B- Granted patents
- 19
- Published applications
- 9
- Assignees
- 8
- Inventors
- 33
- Latest grant
- 21 Feb 2012
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 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 | 2 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 2 |
| 2006 | 4 | 1 |
| 2007 | 0 | 0 |
| 2008 | 2 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Piston pump with at least one piston element21 Feb 2012US 8,118,573 B2Robert Bosch GmbH
- Liquid chromatograph device12 Apr 2011US 7,921,696 B2Hitachi High-Technologies Corporation
- Piston vibratory pump8 Apr 2008US 7,354,255 B1
- Liquid feeding system1 Apr 2008US 7,350,401 B2Hitachi High-Technologies Corporation
- Liquid chromatograph pump with dual cylinders and dual plungers20 Jun 2006US 7,063,513 B2Hitachi High-Technologies Corporation
- Pulsation-free wet spraying machine12 Nov 2020US 2020/0355077 A1Shandong University of Science and Technology
- Piston pump with at least one piston element29 Oct 2009US 2009/0269230 A1Robert Bosch GmbH
- Liquid chromatograph device4 Dec 2008US 2008/0296209 A1Hitachi High-Technologies Corporation
- High pressure pumping apparatus with coupled volumes in a pump working chamber19 Jun 2008US 2008/0145251 A1
- Liquid feeding system5 Jan 2006US 2006/0000759 A1Hitachi High-Technologies Corporation
Most cited
By later US patents
- Reverse osmosis method and apparatus88US 4,187,173 A1980
- Rotary shaft driven reverse osmosis method and apparatus83US 4,288,326 A1981
- Low pulsation displacement pump59US 4,913,624 AHitachi, Ltd. · 1990
- Low pulsation pump device43US 4,810,168 AHitachi, Ltd. · 1989
- Pump for liquid chromatography41US 7,063,785 B2Hitachi High-Technologies Corporation · 2006