F28D 19/044
Shaped in sector form
Official title: {shaped in sector form, e.g. with baskets}
F28D19/044 (Shaped in sector form) appears on 111 US grants and 55 published applications in this corpus.
Search patents in F28D- Granted patents
- 111
- Published applications
- 55
- Assignees
- 45
- Inventors
- 127
- Latest grant
- 7 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 5 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 6 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 8 | 0 |
| 1999 | 6 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 1 |
| 2002 | 5 | 3 |
| 2003 | 7 | 3 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 2 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 4 |
| 2012 | 1 | 2 |
| 2013 | 0 | 3 |
| 2014 | 3 | 6 |
| 2015 | 1 | 2 |
| 2016 | 3 | 4 |
| 2017 | 4 | 7 |
| 2018 | 2 | 3 |
| 2019 | 6 | 8 |
| 2020 | 4 | 2 |
| 2021 | 5 | 1 |
| 2022 | 3 | 2 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Heat exchanger for cooling an aircraft propulsion engine7 Jan 2025US 12,188,412 B2Sogeclair SA
- Rotating heat exchanger with improved heat transfer efficiency11 Oct 2022US 11,466,938 B2Flexit Sverige AB
- Flexible seal for a rotary regenerative preheater17 May 2022US 11,333,446 B2Arvos Ljungstrom LLC
- Heat transfer sheet assembly with an intermediate spacing feature1 Feb 2022US 11,236,949 B2Arvos Ljungstrom LLC
- Rotor for a rotary pre-heater for high temperature operation5 Oct 2021US 11,137,217 B2Arvos Ljungstrom LLC
- Integral energy recovery ventilator with bypass by rotation for rooftops29 Dec 2022US 2022/0412601 A1Carrier Corporation
- Heat exchanger for cooling an aircraft propulsion engine10 Nov 2022US 2022/0356843 A1Sogeclair SA
- Rotating heat exchanger with improved heat transfer efficiency29 Apr 2021US 2021/0123628 A1Flexit Sverige AB
- Energy recovery wheel assembly for an hvac system23 Jul 2020US 2020/0232719 A1Johnson Controls Technology Company
- Heat transfer sheet assembly with an intermediate spacing feature14 May 2020US 2020/0149824 A1Arvos Ljungstrom LLC
Most cited
By later US patents
- Composite label web and method of making same51US 4,214,024 AMonarch Marking Systems, Inc. · 1980
- Heat transfer medium for rotary heat transferrers41US 4,255,171 AWehr Corporation · 1981
- Heat transfer element assembly31US 4,744,410 AThe Air Preheater Company, Inc. · 1988
- Heat transfer element assembly24US 6,019,160 AABB Air Preheater, Inc. · 2000
- Regenerative type carbon dioxide separator and carbon dioxide separating system24US 6,521,026 B1Alstom · 2003