F28C 3/14
The particulate material moving by gravity
Official title: the particulate material moving by gravity, e.g. down a tube
F28C3/14 (The particulate material moving by gravity) appears on 33 US grants and 30 published applications in this corpus.
Search patents in F28C- Granted patents
- 33
- Published applications
- 30
- Assignees
- 38
- Inventors
- 100
- Latest grant
- 19 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 2 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 1 |
| 2012 | 0 | 3 |
| 2013 | 0 | 3 |
| 2014 | 0 | 3 |
| 2015 | 1 | 2 |
| 2016 | 2 | 2 |
| 2017 | 2 | 1 |
| 2018 | 1 | 1 |
| 2019 | 2 | 2 |
| 2020 | 2 | 0 |
| 2021 | 0 | 2 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 3 |
By publication year. Applications have been published since 2001.
Recent patents
- Powder-gas heat exchanger and applications thereof19 Aug 2025US 12,391,611 B2Calix, Inc.
- Heater9 Jan 2024US 11,867,465 B2FARMET a.s.
- Pumped heat energy storage system with convey able solid thermal storage media directly thermally coupled to working fluid15 Sep 2020US 10,775,111 B2Dresser-Rand Company
- Slurry droplet melting heat exchange14 Jan 2020US 10,533,812 B2Hall Labs LLC
- Sorption module26 Nov 2019US 10,488,094 B2Mahle International GmbH
- Powder-Gas Heat Exchanger and Applications Thereof13 Nov 2025US 2025/0346525 A1Calix, Inc.
- Oxidation reactor for solid solar thermochemical fuel28 Aug 2025US 2025/0270464 A1Board of Trustees of Michigan State University
- Cement Waste Recycling Device and Method of Recycling Cement Waste13 Feb 2025US 2025/0051231 A1
- A Powder-Gas Heat Exchanger and Applications Thereof25 May 2023US 2023/0159388 A1Calix, Inc.
- Cement Waste Recycling Device and Method of Recycling Cement Waste15 Apr 2021US 2021/0107831 A1
Most cited
By later US patents
- Heat transfer and storage system124US 4,727,930 AThe Board of Regents of the University of Washington · 1988
- Pumped heat energy storage system with convey able solid thermal storage media directly thermally coupled to working fluid67US 10,775,111 B2Dresser-Rand Company · 2020
- Thermal conversion of volatile fatty acid salts to ketones27US 5,969,189 AThe Texas A&M University System · 1999
- Raining bed heat exchanger and method of use12US 5,992,041 AThermo Power Corporation · 1999
- Apparatus for heat exchange between fine material and gas6US 4,096,642 APolysius AG · 1978