B63C 11/2227
Second-stage regulators
Official title: {Second-stage regulators (B63C11/2245 takes precedence)}
B63C11/2227 (Second-stage regulators) appears on 152 US grants and 85 published applications in this corpus.
Search patents in B63C- Granted patents
- 152
- Published applications
- 85
- Assignees
- 70
- Inventors
- 170
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 7 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 7 |
| 2003 | 3 | 3 |
| 2004 | 6 | 4 |
| 2005 | 5 | 12 |
| 2006 | 2 | 4 |
| 2007 | 4 | 4 |
| 2008 | 4 | 9 |
| 2009 | 1 | 3 |
| 2010 | 6 | 2 |
| 2011 | 2 | 1 |
| 2012 | 1 | 2 |
| 2013 | 4 | 0 |
| 2014 | 4 | 2 |
| 2015 | 1 | 1 |
| 2016 | 0 | 3 |
| 2017 | 1 | 5 |
| 2018 | 3 | 6 |
| 2019 | 2 | 0 |
| 2020 | 2 | 1 |
| 2021 | 0 | 3 |
| 2022 | 6 | 5 |
| 2023 | 2 | 2 |
| 2024 | 0 | 5 |
| 2025 | 2 | 0 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pressure reducing system for a breathing apparatus14 Jul 2026US 12,679,519 B2Head Watersports S.P.A.
- Dual mode breathing apparatus12 May 2026US 12,623,098 B2MSA Technology, LLC
- Pressure-reducing system for a breathing apparatus7 Apr 2026US 12,595,033 B2Head Watersports S.P.A.
- Second stage regulator20 Jan 2026US 12,528,567 B2
- Gas negative pressure valve28 Oct 2025US 12,455,581 B2Ningbo Wanan Co., Ltd.
- Demand regulator28 May 2026US 2026/0145011 A1Dräger Safety AG & Co. KGaA
- Gas negative pressure valve19 Dec 2024US 2024/0419196 A1Ningbo Wanan Co., Ltd.
- Lung demand regulator27 Jun 2024US 2024/0207658 A1Dräger Safety AG & Co. KGaA
- Lung demand regulator27 Jun 2024US 2024/0208623 A1Dräger Safety AG & Co. KGaA
- Low pressure surface supplied air system and method22 Feb 2024US 2024/0059384 A1Setaysha Technical Solutions LLC
Most cited
By later US patents
- Demand valve for a respirator192US 5,042,473 APro-Tech Respirators, Inc. · 1991
- Mouthpiece with coupler75US 6,263,871 B12001
- Second stage demand breathing regulator55US 5,343,858 AU.S. Divers Co., Inc. · 1994
- Pressure regulator45US 6,729,331 B22004
- Second stage demand regulator44US 5,503,140 AU.S. Divers Co., Inc. · 1996