E03C 1/298
Consisting only of non-return valve
Official title: consisting only of non-return valve
E03C1/298 (Consisting only of non-return valve) appears on 54 US grants and 89 published applications in this corpus.
Search patents in E03C- Granted patents
- 54
- Published applications
- 89
- Assignees
- 41
- Inventors
- 110
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 3 |
| 2006 | 0 | 1 |
| 2007 | 1 | 5 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 7 |
| 2011 | 2 | 6 |
| 2012 | 0 | 6 |
| 2013 | 3 | 3 |
| 2014 | 4 | 6 |
| 2015 | 4 | 3 |
| 2016 | 2 | 6 |
| 2017 | 2 | 9 |
| 2018 | 8 | 5 |
| 2019 | 7 | 4 |
| 2020 | 1 | 7 |
| 2021 | 2 | 5 |
| 2022 | 5 | 3 |
| 2023 | 1 | 4 |
| 2024 | 3 | 3 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
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- Positive and negative pressure resistant sealing apparatus of balance shaft two-way valve plate used for drainage pipeline29 Aug 2024US 2024/0287784 A1
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Most cited
By later US patents