E03B 3/20
Of elements of special shape
Official title: of elements of special shape
E03B3/20 (Of elements of special shape) appears on 15 US grants and 7 published applications in this corpus.
Search patents in E03B- Granted patents
- 15
- Published applications
- 7
- Assignees
- 8
- Inventors
- 26
- Latest grant
- 28 Apr 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 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 | 1 | 2 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Nano-particle reinforced well screen28 Apr 2020US 10,633,955 B2Halliburton Energy Services.Inc.
- Well screen with integrated filter or treatment media5 Nov 2019US 10,465,486 B1Ellingson Drainage, Inc.
- Water purification and storage system, water-filtering well and polygonal building block7 Jun 2016US 9,359,755 B2Beijing Rechsand Science & Technology Group Co., Ltd.
- Sand control screen assembly having integral connector rings and method for making same30 Apr 2013US 8,430,158 B2Halliburton Energy Services.Inc.
- Filtering device, especially for use as a well screen filter27 Dec 2011US 8,082,986 B2Pall Corporation
- Nano-particle reinforced screen14 May 2015US 2015/0129199 A1Halliburton Energy Services.Inc.
- Water Purification and Storage System, Water-Filtering Well and Polygonal Building Block23 Apr 2015US 2015/0108053 A1Beijing Rechsand Science & Technology Group Co., Ltd.
- Control Screen Assembly Having Integral Connector Rings and Method for Making Same1 Mar 2012US 2012/0048536 A1Halliburton Energy Services.Inc.
- Well filter2 Dec 2010US 2010/0300986 A1
- Filtering device, especially for use as a well screen filter18 Mar 2010US 2010/0065270 A1Pall Corporation
Most cited
By later US patents
- Apparatus and process for drawing water from a water-bearing strata21US 4,014,387 AThyssen Plastik Anger KG · 1977
- Integral well filter and screen and method for making and using same19US 6,390,192 B2Well, Well, Well, Inc. · 2002
- System for recharging aquifer and apparatus therefor16US 4,199,272 A1980
- Foraminous screening device and method for making same12US 4,133,379 A1979
- Dual cylinder water well filter and method of using the same12US 6,202,750 B12001