F28F 1/00
Tubular elements
Official title: Tubular elements; Assemblies of tubular elements (specially adapted for movement F28F5/00)
F28F1/00 (Tubular elements) appears on 4,855 US grants and 6,028 published applications in this corpus.
Search patents in F28F- Granted patents
- 4,855
- Published applications
- 6,028
- Assignees
- 2,184
- Inventors
- 11,284
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 23 | 0 |
| 1977 | 27 | 0 |
| 1978 | 33 | 0 |
| 1979 | 32 | 0 |
| 1980 | 52 | 0 |
| 1981 | 46 | 0 |
| 1982 | 54 | 0 |
| 1983 | 27 | 0 |
| 1984 | 47 | 0 |
| 1985 | 28 | 0 |
| 1986 | 42 | 0 |
| 1987 | 51 | 0 |
| 1988 | 43 | 0 |
| 1989 | 52 | 0 |
| 1990 | 39 | 0 |
| 1991 | 65 | 0 |
| 1992 | 42 | 0 |
| 1993 | 55 | 0 |
| 1994 | 54 | 0 |
| 1995 | 43 | 0 |
| 1996 | 55 | 0 |
| 1997 | 55 | 0 |
| 1998 | 83 | 0 |
| 1999 | 67 | 0 |
| 2000 | 65 | 0 |
| 2001 | 90 | 30 |
| 2002 | 71 | 99 |
| 2003 | 80 | 118 |
| 2004 | 72 | 148 |
| 2005 | 93 | 177 |
| 2006 | 117 | 159 |
| 2007 | 75 | 208 |
| 2008 | 59 | 198 |
| 2009 | 55 | 235 |
| 2010 | 90 | 250 |
| 2011 | 79 | 252 |
| 2012 | 97 | 178 |
| 2013 | 100 | 321 |
| 2014 | 92 | 321 |
| 2015 | 139 | 284 |
| 2016 | 149 | 303 |
| 2017 | 227 | 331 |
| 2018 | 250 | 325 |
| 2019 | 312 | 314 |
| 2020 | 231 | 316 |
| 2021 | 238 | 284 |
| 2022 | 223 | 299 |
| 2023 | 203 | 267 |
| 2024 | 213 | 249 |
| 2025 | 203 | 220 |
| 2026 | 117 | 142 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F28F 1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area3,683
- F28F 1/02Tubular elements of cross-section which is non-circular1,258
- F28F 1/08Tubular elements crimped or corrugated in longitudinal section162
- F28F 1/003Multiple wall conduits137
- F28F 1/006Tubular elements: with variable shape132
Recent patents
- Condensation dedust-demister set6 Oct 2026US 12,752,224 B2
- Cooling recovery system and method6 Oct 2026US 12,753,937 B2Heds Holdings LLC
- Heat exchanger6 Oct 2026US 12,753,977 B2Kyungdong Navien Co., Ltd.
- Heat exchanger with tube bundle comprising at least two sections15 Sep 2026US 12,736,288 B2Valmex S.P.A.
- Method for producing heat conductive member and heat exchanger8 Sep 2026US 12,728,455 B2NGK Insulators, Ltd.
- Heat exchanger8 Oct 2026US 2026/0309428 A1Hanon Systems
- Highly efficient and economical fluid flat tube structure24 Sep 2026US 2026/0287092 A1
- Heat exchanger24 Sep 2026US 2026/0287275 A1Daikin Industries, Ltd.
- Secondarily applied cold side features for cast heat exchanger24 Sep 2026US 2026/0287277 A1Rtx Corporation
- Pipes having topographic inner structures17 Sep 2026US 2026/0276322 A1Karlsruher Institut Fuer Technologie
Most cited
By later US patents
- Computing infrastructure672US 8,706,914 B22014
- Inline heat exchanger and cardioplegia system184US 5,403,281 AMinnesota Mining and Manufacturing Company · 1995
- Compact vacuum insulation176US 5,157,893 AMidwest Research Institute · 1992
- Compact vacuum insulation174US 5,175,975 AMidwest Research Institute · 1993
- Selectively cooled or heated seat construction and apparatus for providing temperature conditioned fluid and method therefor168US 5,117,638 A1992