F28F 9/04
Arrangements for sealing elements into header boxes or end plates
Official title: Arrangements for sealing elements into header boxes or end plates {(arrangements for sealing flow lines connectors to header boxes F28F9/0248)}
F28F9/04 (Arrangements for sealing elements into header boxes or end plates) appears on 933 US grants and 739 published applications in this corpus.
Search patents in F28F- Granted patents
- 933
- Published applications
- 739
- Assignees
- 486
- Inventors
- 2,138
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 16 | 0 |
| 1980 | 16 | 0 |
| 1981 | 16 | 0 |
| 1982 | 15 | 0 |
| 1983 | 9 | 0 |
| 1984 | 16 | 0 |
| 1985 | 24 | 0 |
| 1986 | 16 | 0 |
| 1987 | 21 | 0 |
| 1988 | 20 | 0 |
| 1989 | 19 | 0 |
| 1990 | 9 | 0 |
| 1991 | 21 | 0 |
| 1992 | 20 | 0 |
| 1993 | 26 | 0 |
| 1994 | 25 | 0 |
| 1995 | 11 | 0 |
| 1996 | 16 | 0 |
| 1997 | 8 | 0 |
| 1998 | 18 | 0 |
| 1999 | 20 | 0 |
| 2000 | 17 | 0 |
| 2001 | 21 | 6 |
| 2002 | 13 | 21 |
| 2003 | 15 | 12 |
| 2004 | 17 | 20 |
| 2005 | 13 | 37 |
| 2006 | 19 | 28 |
| 2007 | 9 | 22 |
| 2008 | 12 | 24 |
| 2009 | 10 | 23 |
| 2010 | 9 | 30 |
| 2011 | 12 | 16 |
| 2012 | 13 | 12 |
| 2013 | 6 | 17 |
| 2014 | 11 | 18 |
| 2015 | 17 | 33 |
| 2016 | 14 | 42 |
| 2017 | 25 | 42 |
| 2018 | 31 | 49 |
| 2019 | 46 | 53 |
| 2020 | 43 | 47 |
| 2021 | 41 | 38 |
| 2022 | 22 | 45 |
| 2023 | 32 | 34 |
| 2024 | 32 | 38 |
| 2025 | 31 | 13 |
| 2026 | 14 | 19 |
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.
- Connecting pipe assembly and heat exchanger19 May 2026US 12,631,408 B2Danfoss A/S
- Manifold connection device12 May 2026US 12,624,776 B1Kuen Tong Industrial Co., Ltd
- Tubular membrane heat exchanger12 May 2026US 12,624,897 B2Baltimore Aircoil Company, Inc.
- A coupling device, a kit, and a heat transfer arrangement comprising the same17 Sep 2026US 2026/0276325 A1Qvantum Industries AB
- Economizers for waste heat recovery systems27 Aug 2026US 2026/0251406 A1Scope Technology and Manufacturing, LLC
- Heat Exchanger That Has A Mechanical Connection Between The Tank And The Base27 Aug 2026US 2026/0251407 A1Mahle International 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.
Most cited
By later US patents
- Self-centering seal for use in hydraulically expanding tubes152US 4,359,889 AHaskel Engineering & Supply Company · 1982
- Force-fitted connection of a circular metal tube in an oval housing96US 4,826,347 ACegedur Societe de Transformation de l'Aluminium Pechiney · 1989
- Heat exchanger with oblong grommetted tubes and locating plates91US 5,538,079 A1996
- Method and apparatus for joining a tubular element to a support85US 4,204,312 ASerck Industries Limited · 1980
- Condenser for use in a car cooling system81US 4,825,941 AShowa Aluminum Corporation · 1989