C01B 17/12
Insoluble sulfur
Official title: Insoluble sulfur (mu-sulfur)
C01B17/12 (Insoluble sulfur) appears on 18 US grants and 11 published applications in this corpus.
Search patents in C01B- Granted patents
- 18
- Published applications
- 11
- Assignees
- 14
- Inventors
- 47
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 2 |
| 2018 | 2 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 2 |
| 2021 | 1 | 2 |
| 2022 | 2 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Production system and method for insoluble sulfur11 Nov 2025US 12,465,903 B2China Petroleum & Chemical Corporation
- Preparation method for insoluble sulfur and anti-reversion stabilizer used thereby30 Aug 2022US 11,427,469 B2Shandong Yanggu Huatai Chemical Co, Ltd.
- Continuous process for producing insoluble sulfur18 Jan 2022US 11,225,411 B2China University of Petroleum (East China)
- Method for the manufacture of cyclododecasulfur13 Jul 2021US 11,059,722 B2Eastman Chemical Company
- Method for the manufacture of cyclododecasulfur7 Apr 2020US 10,611,637 B2Eastman Chemical Company
- Production System and Method for Insoluble Sulfur2 Feb 2023US 2023/0035805 A1China Petroleum & Chemical Corporation
- Preparation method for insoluble sulfur and anti-reversion stabilizer used thereby2 Sep 2021US 2021/0269309 A1Shandong Yanggu Huatai Chemical Co, Ltd.
- Continuos process for producing insoluble sulfur1 Jul 2021US 2021/0198108 A1China University of Petroleum (East China)
- Method for the manufacture of cyclododecasulfur9 Jul 2020US 2020/0216316 A1Eastman Chemical Company
- Method for the manufacture of cyclododecasulfur2 Jul 2020US 2020/0207621 A1Eastman Chemical Company
Most cited
By later US patents
- Sulfur plasticization with olefins15US 4,190,460 ASuntech, Inc. · 1980
- Method for oil-treating insoluble sulfur12US 4,238,470 AStauffer Chemical Company · 1980
- Power board6US 5,483,417 AHitachi, Ltd. · 1996
- Power board5US 5,216,575 AHitachi, Ltd. · 1993
- Process for the production of insoluble sulfur4US 4,359,452 AStauffer Chemical Company · 1982