F28D 9/0012
The apparatus having an annular form
Official title: {the apparatus having an annular form}
F28D9/0012 (The apparatus having an annular form) appears on 291 US grants and 224 published applications in this corpus.
Search patents in F28D- Granted patents
- 291
- Published applications
- 224
- Assignees
- 171
- Inventors
- 581
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 8 | 0 |
| 1985 | 7 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 9 | 0 |
| 1993 | 7 | 0 |
| 1994 | 4 | 0 |
| 1995 | 7 | 0 |
| 1996 | 9 | 0 |
| 1997 | 4 | 0 |
| 1998 | 9 | 0 |
| 1999 | 4 | 0 |
| 2000 | 7 | 0 |
| 2001 | 11 | 4 |
| 2002 | 9 | 11 |
| 2003 | 6 | 16 |
| 2004 | 9 | 3 |
| 2005 | 9 | 9 |
| 2006 | 8 | 5 |
| 2007 | 2 | 7 |
| 2008 | 2 | 4 |
| 2009 | 2 | 3 |
| 2010 | 3 | 9 |
| 2011 | 3 | 15 |
| 2012 | 1 | 19 |
| 2013 | 8 | 4 |
| 2014 | 8 | 8 |
| 2015 | 6 | 18 |
| 2016 | 10 | 17 |
| 2017 | 12 | 14 |
| 2018 | 14 | 14 |
| 2019 | 13 | 11 |
| 2020 | 13 | 3 |
| 2021 | 8 | 7 |
| 2022 | 4 | 3 |
| 2023 | 7 | 8 |
| 2024 | 2 | 4 |
| 2025 | 8 | 5 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Annular plate-fin heat exchanger22 Sep 2026US 12,742,597 B2Hamilton Sundstrand Corporation
- Aircraft heat exchangers and plates11 Aug 2026US 12,704,330 B2Rtx Corporation
- Air-oil heat exchanger comprising divergent parietal channels23 Dec 2025US 12,503,959 B2Safran Aero Boosters SA
- Flexural support for heat exchanger cores2 Dec 2025US 12,487,037 B2Hamilton Sundstrand Corporation
- Compact radial condenser18 Nov 2025US 12,474,095 B2B/E Aerospace, Inc.
- Oil radiator and oil cooler assembly thereof26 Feb 2026US 2026/0055974 A1Zhejiang Letuhui Auto Parts Co., Ltd.
- Annular plate-fin heat exchanger5 Feb 2026US 2026/0036374 A1Hamilton Sundstrand Corporation
- Variable length fin heat exchanger and corresponding turbomachine8 Jan 2026US 2026/0009598 A1Safran
- Air-oil heat exchanger20 Nov 2025US 2025/0354517 A1Safran Aero Boosters SA
- Optimised air-oil heat exchanger6 Nov 2025US 2025/0341183 A1Safran Aero Boosters SA
Most cited
By later US patents
- Cooling disk unit for use in a wafer chucking device535US 6,499,533 B2Sumitomo Heavy Industries, Ltd. · 2002
- Integrated fuel reformation and thermal management system for solid oxide fuel cell systems120US 6,485,852 B1Delphi Technologies, Inc. · 2002
- Turbine engine with intercooler in bypass air passage118US 6,134,880 AConcepts ETI, Inc. · 2000
- Spiral ripple circumferential flow heat exchanger98US 5,343,936 ALong Manufacturing Ltd. · 1994
- Gas turbine generator set78US 5,497,615 A1996