B63C 11/24
In closed circulation
Official title: in closed circulation
B63C11/24 (In closed circulation) appears on 109 US grants and 79 published applications in this corpus.
Search patents in B63C- Granted patents
- 109
- Published applications
- 79
- Assignees
- 62
- Inventors
- 194
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 1 |
| 2002 | 1 | 2 |
| 2003 | 1 | 3 |
| 2004 | 3 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 3 |
| 2008 | 0 | 1 |
| 2009 | 3 | 6 |
| 2010 | 1 | 7 |
| 2011 | 0 | 5 |
| 2012 | 4 | 6 |
| 2013 | 4 | 2 |
| 2014 | 7 | 1 |
| 2015 | 0 | 2 |
| 2016 | 3 | 3 |
| 2017 | 2 | 3 |
| 2018 | 2 | 2 |
| 2019 | 0 | 1 |
| 2020 | 2 | 2 |
| 2021 | 2 | 7 |
| 2022 | 0 | 5 |
| 2023 | 3 | 1 |
| 2024 | 4 | 6 |
| 2025 | 5 | 6 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Head of a closed-circuit diving breathing apparatus (rebreather)22 Sep 2026US 12,741,726 B2Xdeep Sp. Z O. O. Sp. K.
- Gas distributor for rebreather supporting closed and open circuit modes31 Mar 2026US 12,589,846 B2Oxygen Scientific GmbH
- Compact canister of the bed of carbon dioxide absorbent (scrubber)4 Nov 2025US 12,458,919 B2Xdeep Sp. Z O. O. Sp. K.
- Counterlung for a rebreathing apparatus5 Aug 2025US 12,377,295 B2Johnson Outdoors Inc.
- First stage pressure regulator with threshold actuation24 Jun 2025US 12,337,942 B2
- Cartridge for capturing co29 Apr 2026US 2026/0097351 A1Safran Aerosystems
- Oxygen breathing apparatus20 Nov 2025US 2025/0352833 A1Salix LLC
- Automated recreational closed circuit breathing device2 Oct 2025US 2025/0304229 A1Tesseron Ltd.
- System for inhalation-based underwater alerts26 Jun 2025US 2025/0206422 A1
- Compact canister of the bed of carbon dioxide absorbent (scrubber)10 Apr 2025US 2025/0114738 A1Xdeep Sp. Z O. O. Sp. K.
Most cited
By later US patents
- Closed circuit breathing device with pressure sensing means59US 5,076,267 ADragerwerk Aktiengesellschaft · 1991
- Breathing apparatus54US 4,964,404 A1990
- Self-contained breathing apparatus51US 6,712,071 B12004
- Re-breather diving unit with oxygen adjustment for decompression optimization50US 4,939,647 ACarmellan Research Limited · 1990
- Breathing apparatus mouthpiece49US 5,127,398 ACis-Lunar Development Laboratories, Inc. · 1992