C01B 17/34
Polysulfides of sodium or potassium
C01B17/34 (Polysulfides of sodium or potassium) appears on 19 US grants and 19 published applications in this corpus.
Search patents in C01B- Granted patents
- 19
- Published applications
- 19
- Assignees
- 21
- Inventors
- 79
- Latest grant
- 11 Jan 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 2 |
| 2003 | 0 | 2 |
| 2004 | 0 | 1 |
| 2005 | 2 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 3 |
| 2018 | 2 | 1 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for regenerating catalysts used for production of polysulphide cooking liquors11 Jan 2022US 11,219,881 B2Andritz Inc.
- Process for recovering alkali metals and sulfur from alkali metal sulfides and polysulfides2 Oct 2018US 10,087,538 B2Field Upgrading Limited
- Oxidation process for producing potassium thiosulfate5 Jun 2018US 9,988,270 B2Tessenderlo Kerley, Inc.
- Process for recovering alkali metals and sulfur from alkali metal sulfides and polysulfides25 Oct 2016US 9,475,998 B2Ceramatec, Inc.
- Generation of active polysulphide with manganese and bismuth catalysts11 Jan 2011US 7,867,360 B2FPInnovations
- Solvent-Free, Low Temperature Synthesis of Sulfide-type Sodium-Ion Conductors20 Nov 2025US 2025/0353744 A1
- Method for producing metal and/or metalloid-containing sulfide, and sodium-containing sulfide23 Jan 2025US 2025/0026640 A1University Public Corporation Osaka
- Polysulfide Compositions and Processes for Making Same15 Dec 2022US 2022/0396483 A1Tessenderlo Kerley, Inc.
- Sulfides Electrolyte for Metal Processing and Extraction6 Aug 2020US 2020/0247670 A1Massachusetts Institute of Technology
- Sulfides electrolyte for metal processing and extraction2 May 2019US 2019/0127221 A1
Most cited
By later US patents
- Production of polysulfide with PTFE coated catalyst32US 4,024,229 AThe Mead Corporation · 1977
- Method of preparing polysulphidic silyl ethers32US 5,770,754 ABayer Aktiengesellschaft · 1998
- Process for production of sodium thiosulfate and sodium hydroxide22US 4,162,187 AThe Mead Corporation · 1979
- Combined process for upgrading spent alkylation acid and reducing noxious gas content of waste gaseous streams14US 4,014,982 ATexaco Development Corporation · 1977
- Method of oxidizing sulfide-containing liquor14US 4,855,123 AMitsubishi Paper Mills Limited · 1989