F03D 9/35
Within towers
Official title: within towers, e.g. using chimney effects
F03D9/35 (Within towers) appears on 115 US grants and 153 published applications in this corpus.
Search patents in F03D- Granted patents
- 115
- Published applications
- 153
- Assignees
- 57
- Inventors
- 249
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 3 | 5 |
| 2004 | 0 | 4 |
| 2005 | 1 | 1 |
| 2006 | 2 | 4 |
| 2007 | 2 | 3 |
| 2008 | 2 | 2 |
| 2009 | 3 | 9 |
| 2010 | 4 | 9 |
| 2011 | 5 | 11 |
| 2012 | 4 | 13 |
| 2013 | 7 | 7 |
| 2014 | 8 | 11 |
| 2015 | 10 | 7 |
| 2016 | 6 | 4 |
| 2017 | 5 | 5 |
| 2018 | 4 | 6 |
| 2019 | 6 | 6 |
| 2020 | 4 | 7 |
| 2021 | 7 | 9 |
| 2022 | 6 | 7 |
| 2023 | 2 | 5 |
| 2024 | 7 | 10 |
| 2025 | 5 | 4 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Solar energy directed to a cylinder containing a propeller used to generate electricity21 Oct 2025US 12,448,953 B2
- Lighting device using combined power generation14 Oct 2025US 12,442,523 B2
- Convection-driven power generator26 Aug 2025US 12,398,701 B2
- Wind powered generator10 Jun 2025US 12,326,136 B2
- Solar energy directed to a cylinder containing a propeller used to generate electricity25 Mar 2025US 12,258,946 B2
- Hybrid solar chimney23 Jul 2026US 2026/0210331 A1SüLeyman Demirel üNiversitesi Idari Ve Mali Isler Daire Baskanligi Genel Sekreterlik
- Solar Vortex Clamshell Greenhouse12 Mar 2026US 2026/0071608 A1
- Energy harvesting device26 Feb 2026US 2026/0055930 A1
- Solar Energy Directed to a Cylinder having Voids and Containing a Screw Auger Propeller Used to Generate Electricity19 Feb 2026US 2026/0049600 A1
- Air-Water Thermal Power Plants9 Oct 2025US 2025/0314179 A1
Most cited
By later US patents
- System for the obtaining of energy by fluid flows resembling a natural cyclone or anti-cyclone149US 4,452,046 A1984
- Power system75US 3,936,652 A1976
- Power tower—system and method of using air flow generated by geothermal generated heat to drive turbines generators for the generation of electricity75US 9,574,551 B2GTherm, Inc. · 2017
- Wind or water operated power plant61US 4,079,264 A1978
- Wind and solar powered turbine60US 4,433,544 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1984