F28F 9/0135
Formed by grids having only one tube per closed grid opening
Official title: {formed by grids having only one tube per closed grid opening (F28F9/0132 and F28F9/0133 take precedence)}
F28F9/0135 (Formed by grids having only one tube per closed grid opening) appears on 65 US grants and 33 published applications in this corpus.
Search patents in F28F- Granted patents
- 65
- Published applications
- 33
- Assignees
- 50
- Inventors
- 143
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 3 |
| 2010 | 0 | 2 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 3 | 2 |
| 2018 | 0 | 2 |
| 2019 | 1 | 2 |
| 2020 | 2 | 3 |
| 2021 | 1 | 0 |
| 2022 | 1 | 1 |
| 2023 | 1 | 5 |
| 2024 | 3 | 1 |
| 2025 | 1 | 4 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heat exchanger with a vertical rod baffle structure and at least one notched longitudinal partition plate2 Jun 2026US 12,644,650 B2Lummus Novolen Technology GmbH
- Baffles for heat exchangers7 Apr 2026US 12,595,977 B2Yara International Asa
- Deflector and grid support assemblies for use in heat exchangers and heat exchangers having such assemblies therein25 Feb 2025US 12,235,057 B2Lindain Engineering, Inc.
- Connection tube support of waste heat recovery boiler and waste heat recovery boiler including same29 Oct 2024US 12,130,010 B2Doosanenerbility Co., Ltd.
- Corrugated grid support for vertical boiling reactor9 Jul 2024US 12,030,028 B2Scientific Design Company, Inc.
- Pair of support plates for tubes in a reactor vessel2 Oct 2025US 2025/0305674 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Support plate for tubes in a reactor vessel2 Oct 2025US 2025/0308716 A1L' Air Liquide, Societe Anonyme pour I' Etude et I'Exploitation des Procedes Georges Claude
- Distillation unit5 Jun 2025US 2025/0180295 A1LG Electronics Inc.
- Reforming exchanger tubesheet and shell flange design6 Mar 2025US 2025/0075982 A1Kellogg Brown & Root LLC
- Connection tube support of waste heat recovery boiler and waste heat recovery boiler including same30 May 2024US 2024/0175572 A1Doosan Enerbility Co., Ltd.
Most cited
By later US patents
- Surgical cutting instrument80US 6,152,894 A2000
- Support for heat exchange tubes30US 4,344,480 AEcolaire Incorporated · 1982
- Steam generator tube supports26US 4,359,088 AThe Babcock & Wilcox Company · 1982
- Tube bundle support25US 4,579,304 A1986
- Heat exchanger baffles24US 3,967,677 AMobil Oil Corporation · 1976