B01D 71/404
Polymers based on the polymerisation of crotonic acid
Official title: {Polymers based on the polymerisation of crotonic acid}
B01D71/404 (Polymers based on the polymerisation of crotonic acid) appears on 12 US grants and 10 published applications in this corpus.
Search patents in B01D- Granted patents
- 12
- Published applications
- 10
- Assignees
- 4
- Inventors
- 36
- Latest grant
- 4 Jul 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 1 | 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 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 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 | 1 | 1 |
| 2019 | 2 | 3 |
| 2020 | 2 | 4 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 2 | 0 |
By publication year. Applications have been published since 2001.
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Most cited
By later US patents
- Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups60US 4,839,203 AThe Dow Chemical Company · 1989
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- Metal ionomer membranes for gas separation13US 4,789,386 AThe Dow Chemical Company · 1988
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