F28F 9/18
By welding
Official title: by welding
F28F9/18 (By welding) appears on 513 US grants and 406 published applications in this corpus.
Search patents in F28F- Granted patents
- 513
- Published applications
- 406
- Assignees
- 280
- Inventors
- 1,221
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 8 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 7 | 0 |
| 1985 | 7 | 0 |
| 1986 | 10 | 0 |
| 1987 | 7 | 0 |
| 1988 | 11 | 0 |
| 1989 | 12 | 0 |
| 1990 | 6 | 0 |
| 1991 | 16 | 0 |
| 1992 | 13 | 0 |
| 1993 | 20 | 0 |
| 1994 | 11 | 0 |
| 1995 | 5 | 0 |
| 1996 | 8 | 0 |
| 1997 | 7 | 0 |
| 1998 | 13 | 0 |
| 1999 | 12 | 0 |
| 2000 | 9 | 0 |
| 2001 | 13 | 3 |
| 2002 | 10 | 18 |
| 2003 | 12 | 10 |
| 2004 | 13 | 13 |
| 2005 | 7 | 28 |
| 2006 | 16 | 23 |
| 2007 | 6 | 13 |
| 2008 | 10 | 14 |
| 2009 | 7 | 12 |
| 2010 | 4 | 20 |
| 2011 | 9 | 11 |
| 2012 | 8 | 6 |
| 2013 | 5 | 9 |
| 2014 | 5 | 8 |
| 2015 | 11 | 19 |
| 2016 | 8 | 24 |
| 2017 | 14 | 21 |
| 2018 | 17 | 20 |
| 2019 | 22 | 21 |
| 2020 | 23 | 30 |
| 2021 | 22 | 12 |
| 2022 | 10 | 24 |
| 2023 | 14 | 22 |
| 2024 | 14 | 20 |
| 2025 | 16 | 1 |
| 2026 | 7 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heat exchanger and hot water apparatus including heat exchanger8 Sep 2026US 12,729,878 B2Noritz Corporation
- Refrigerator16 Jun 2026US 12,656,046 B2LG Electronics Inc.
- Pipe connection assembly of heat exchanger5 May 2026US 12,618,621 B2Hanon Systems
- Heat exchanger, heat pump device, and method of manufacturing heat exchanger24 Mar 2026US 12,583,042 B2Daikin Industries, Ltd.
- Method for producing welded connections and an auxiliary device24 Mar 2026US 12,583,044 B2GEA TDS GmbH
- Apparatus, System and Method for Heat Exchanger End Plate Erosion Resistance13 Aug 2026US 2026/0235371 A1Westermeyer Industries Inc.
- Heat exchanger, method for manufacturing the same, and refrigeration apparatus6 Aug 2026US 2026/0227137 A1Daikin Industries, Ltd.
- Heat exchanger and air conditioner comprising same23 Jul 2026US 2026/0210648 A1Samsung Electronics Co., Ltd.
- Tube-sheet assembly for urea plant30 Apr 2026US 2026/0118073 A1Stamicarbon B. V.
- Heat transfer pipe, heat exchanger, pipe expanding tool, pipe expanding device, method for connecting heat transfer pipe and pipe, and method for manufacturing heat exchanger28 Aug 2025US 2025/0271218 A1Mitsubishi Electric Corporation
Most cited
By later US patents
- Condenser for use in a car cooling system81US 4,825,941 AShowa Aluminum Corporation · 1989
- Stirling engine having platelet heat exchanging elements59US 6,513,326 B12003
- Differential coatings for microextruded tubes used in parallel flow heat exchangers56US 5,544,698 APeerless of America, Inc. · 1996
- Combination radiator and condenser apparatus for motor vehicle55US 5,009,262 AGeneral Motors Corporation · 1991
- Overmolding insert for heat exchanger, process for manufacturing a heat exchanger, and heat exchanger produced thereby51US 6,787,116 B2Aquatherm Industries, Inc. · 2004