F28F 21/082
From steel or ferrous alloys
Official title: {from steel or ferrous alloys}
F28F21/082 (From steel or ferrous alloys) appears on 295 US grants and 383 published applications in this corpus.
Search patents in F28F- Granted patents
- 295
- Published applications
- 383
- Assignees
- 272
- Inventors
- 938
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 2 |
| 2002 | 3 | 4 |
| 2003 | 1 | 6 |
| 2004 | 4 | 8 |
| 2005 | 3 | 8 |
| 2006 | 6 | 6 |
| 2007 | 5 | 15 |
| 2008 | 1 | 11 |
| 2009 | 1 | 6 |
| 2010 | 6 | 9 |
| 2011 | 6 | 12 |
| 2012 | 8 | 19 |
| 2013 | 5 | 9 |
| 2014 | 6 | 14 |
| 2015 | 8 | 24 |
| 2016 | 9 | 25 |
| 2017 | 12 | 17 |
| 2018 | 19 | 28 |
| 2019 | 21 | 26 |
| 2020 | 21 | 28 |
| 2021 | 23 | 23 |
| 2022 | 18 | 23 |
| 2023 | 14 | 26 |
| 2024 | 17 | 16 |
| 2025 | 11 | 6 |
| 2026 | 8 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Internally profiled tubes18 Aug 2026US 12,710,236 B2Paralloy Limited
- Vapor chamber with support structure30 Jun 2026US 12,669,293 B2Delta Electronics, Inc.
- Heat transfer structure of divertor23 Jun 2026US 12,665,095 B2Hefei Institutes of Physical Science, Chinese Academy of Sciences
- Heat exchanger with a fluid flow tube and protection against micrometeorites2 Jun 2026US 12,643,166 B2Liebherr-Aerospace Toulouse SAS
- Method for improving efficiency of heat transmission by steam21 Apr 2026US 12,607,421 B2Kurita Water Industries Ltd.
- Thermal energy storage8 Oct 2026US 2026/0309431 A1Magaldi Power S.P.A.
- Duplex stainless steel and use thereof20 Aug 2026US 2026/0242913 A1Stamicarbon B. V.
- Apparatus, System and Method for Heat Exchanger End Plate Erosion Resistance13 Aug 2026US 2026/0235371 A1Westermeyer Industries Inc.
- Liquid distributor branch pipe structure and liquid distributor23 Jul 2026US 2026/0210459 A1Hanshan Ruike Metal Co., Ltd.
- Heat dissipation apparatus23 Jul 2026US 2026/0210643 A1Kmw Inc.
Most cited
By later US patents
- Method and apparatus for the production of energy68US 7,028,478 B2Advanced Combustion Energy Systems, Inc. · 2006
- Cryogenic heat exchanger57US 5,901,783 ACroyogen, Inc. · 1999
- Wrought stainless steel compositions having engineered microstructures for improved heat resistance49US 7,258,752 B2UT-Battelle, LLC · 2007
- Flexible catheter cryosurgical system47US 6,035,657 ACryoGen, Inc. · 2000
- Method and apparatus for minimizing adverse effects of thermal expansion in a heat exchange reactor36US 7,117,934 B2H2Gen Innovations, Inc. · 2006