Y02A 20/212
Solar-powered wastewater sewage treatment
Official title: Solar-powered wastewater sewage treatment, e.g. spray evaporation
Y02A20/212 (Solar-powered wastewater sewage treatment) appears on 970 US grants and 1,133 published applications in this corpus.
Search patents in Y02A- Granted patents
- 970
- Published applications
- 1,133
- Assignees
- 547
- Inventors
- 2,082
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 5 | 0 |
| 1978 | 13 | 0 |
| 1979 | 13 | 0 |
| 1980 | 24 | 0 |
| 1981 | 7 | 0 |
| 1982 | 18 | 0 |
| 1983 | 10 | 0 |
| 1984 | 8 | 0 |
| 1985 | 6 | 0 |
| 1986 | 6 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 8 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 2 |
| 2002 | 11 | 11 |
| 2003 | 9 | 16 |
| 2004 | 11 | 25 |
| 2005 | 7 | 35 |
| 2006 | 16 | 37 |
| 2007 | 14 | 24 |
| 2008 | 23 | 49 |
| 2009 | 19 | 32 |
| 2010 | 34 | 44 |
| 2011 | 22 | 61 |
| 2012 | 31 | 60 |
| 2013 | 25 | 43 |
| 2014 | 37 | 68 |
| 2015 | 36 | 50 |
| 2016 | 37 | 54 |
| 2017 | 35 | 70 |
| 2018 | 50 | 67 |
| 2019 | 56 | 71 |
| 2020 | 62 | 75 |
| 2021 | 58 | 75 |
| 2022 | 49 | 66 |
| 2023 | 45 | 38 |
| 2024 | 39 | 35 |
| 2025 | 33 | 10 |
| 2026 | 19 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Utilizing alternative energy for water purification, water disposal, industrial heat, and electricity18 Aug 2026US 12,709,553 B2Katz Water Tech, LLC
- System for desalinating saltwater16 Jun 2026US 12,654,111 B2
- Solar thermal panel and method for producing water2 Jun 2026US 12,644,261 B2Akua S.R.L.
- Methods and systems for separating metals12 May 2026US 12,623,161 B2Nant Holdings IP, LLC
- Forward osmosis driven by electrolysis12 May 2026US 12,623,188 B2President and Fellows of Harvard College
- Methods And Systems For Separating Metals6 Aug 2026US 2026/0224998 A1Nant Holdings IP, LLC
- Highly efficient, salt rejecting, wick-free solar evaporation9 Jul 2026US 2026/0193107 A1Massachusetts Institute of Technology
- Mobile light processing system18 Jun 2026US 2026/0167525 A1Focal Technologies Incorporated
- Evaporator for solar-driven desalination, method for manufacturing the same, and hybrid desalination system including the same11 Jun 2026US 2026/0158406 A1UIF (University Industry Foundation), Yonsei University
- Clean water production system21 May 2026US 2026/0138894 A1
Most cited
By later US patents
- Portable, potable water recovery and dispensing apparatus198US 6,182,453 B2Worldwide Water, Inc. · 2001
- Method of an apparatus for sterilizing aqueous media, more particularly drinking water122US 4,857,204 A1989
- Portable, potable water recovery and dispensing apparatus121US 6,058,718 A2000
- Hand-held ultraviolet water purification system using solid state devices102US 6,579,495 B1Hydro-Photon, Inc. · 2003
- Diffusion driven desalination apparatus and process88US 6,919,000 B2University of Florida · 2005