F28B
Steam or vapour condensers
Official title: STEAM OR VAPOUR CONDENSERS (condensation of vapours B01D5/00; steam engine plants having condensers F01K; liquefaction of gases F25J; details of heat-exchange and heat-transfer arrangements of general application F28F)
F28B (Steam or vapour condensers) appears on 969 US grants and 839 published applications in this corpus.
Search patents in F28B- Granted patents
- 969
- Published applications
- 839
- Assignees
- 585
- Inventors
- 2,065
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 12 | 0 |
| 1978 | 9 | 0 |
| 1979 | 12 | 0 |
| 1980 | 27 | 0 |
| 1981 | 23 | 0 |
| 1982 | 13 | 0 |
| 1983 | 11 | 0 |
| 1984 | 12 | 0 |
| 1985 | 24 | 0 |
| 1986 | 15 | 0 |
| 1987 | 13 | 0 |
| 1988 | 18 | 0 |
| 1989 | 7 | 0 |
| 1990 | 12 | 0 |
| 1991 | 10 | 0 |
| 1992 | 15 | 0 |
| 1993 | 7 | 0 |
| 1994 | 7 | 0 |
| 1995 | 8 | 0 |
| 1996 | 12 | 0 |
| 1997 | 5 | 0 |
| 1998 | 13 | 0 |
| 1999 | 18 | 0 |
| 2000 | 13 | 0 |
| 2001 | 25 | 9 |
| 2002 | 13 | 11 |
| 2003 | 10 | 12 |
| 2004 | 10 | 9 |
| 2005 | 6 | 16 |
| 2006 | 14 | 26 |
| 2007 | 8 | 13 |
| 2008 | 9 | 18 |
| 2009 | 13 | 30 |
| 2010 | 7 | 47 |
| 2011 | 14 | 31 |
| 2012 | 24 | 37 |
| 2013 | 16 | 39 |
| 2014 | 26 | 47 |
| 2015 | 24 | 52 |
| 2016 | 31 | 57 |
| 2017 | 53 | 56 |
| 2018 | 40 | 53 |
| 2019 | 64 | 48 |
| 2020 | 56 | 51 |
| 2021 | 42 | 46 |
| 2022 | 34 | 32 |
| 2023 | 26 | 25 |
| 2024 | 33 | 35 |
| 2025 | 23 | 16 |
| 2026 | 11 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F28B 1/00Condensers in which the steam or vapour is separate from the cooling666
- F28B 9/00Auxiliary systems, arrangements, or devices409
- F28B 11/00Controlling arrangements with features specially adapted for condensers85
- F28B 3/00Condensers in which the steam or vapour comes into direct contact with75
- F28B 7/00Combinations of two or more condensers53
- F28B 5/00Condensers employing a combination of the methods covered by main groups f28b1/0022
Recent patents
- Condensation dedust-demister set6 Oct 2026US 12,752,224 B2
- Energy recovery system11 Aug 2026US 12,704,329 B2
- System and method for improving water quality of dehydration tower in purified terephthalic acid device23 Jun 2026US 12,661,603 B2Tianhua Institute of Chemical Machinery and Automation Co., Ltd
- Steam heat exchanger2 Jun 2026US 12,644,648 B2
- Evaporative condenser21 Apr 2026US 12,607,391 B2Kyungdong Navien Co., Ltd.
- Condenser1 Oct 2026US 2026/0298543 A1Mitsubishi Heavy Industries, Ltd.
- Condenser with a triply periodic minimal surface structure heat exchange core1 Oct 2026US 2026/0298544 A1The Hong Kong University of Science and Technology
- Non-electromechanical, pumpless liquid recirculation system for air-cooled condenser and cooler adiabatic pre-cooling system24 Sep 2026US 2026/0287262 A1
- Chiller assembly suitable for a heating, ventilating, or air conditioning (hvac) system27 Aug 2026US 2026/0251363 A1Tyco Fire & Security GmbH
- Condensing device and heat pump system comprising same20 Aug 2026US 2026/0243480 A1
Most cited
By later US patents
- Hydraulic fracturing system and method179US 9,840,897 B22017
- Thermoelectric device with evaporating/condensing heat exchanger139US 5,737,923 AMarlow Industries, Inc. · 1998
- Thermoelectric refrigerator with evaporating/condensing heat exchanger113US 6,003,319 AMarlow Industries, Inc. · 1999
- Compression and condensation of turbine exhaust steam88US 6,484,503 B12002
- Method of monitoring condenser performance and system therefor86US 4,390,058 AHitachi, Ltd. · 1983