C01B 17/00
Sulfur
Official title: Sulfur; Compounds thereof
C01B17/00 (Sulfur) appears on 3,251 US grants and 1,950 published applications in this corpus.
Search patents in C01B- Granted patents
- 3,251
- Published applications
- 1,950
- Assignees
- 1,359
- Inventors
- 5,855
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 137 | 0 |
| 1977 | 110 | 0 |
| 1978 | 100 | 0 |
| 1979 | 86 | 0 |
| 1980 | 76 | 0 |
| 1981 | 74 | 0 |
| 1982 | 60 | 0 |
| 1983 | 74 | 0 |
| 1984 | 72 | 0 |
| 1985 | 67 | 0 |
| 1986 | 53 | 0 |
| 1987 | 55 | 0 |
| 1988 | 50 | 0 |
| 1989 | 82 | 0 |
| 1990 | 76 | 0 |
| 1991 | 71 | 0 |
| 1992 | 64 | 0 |
| 1993 | 48 | 0 |
| 1994 | 60 | 0 |
| 1995 | 45 | 0 |
| 1996 | 60 | 0 |
| 1997 | 55 | 0 |
| 1998 | 50 | 0 |
| 1999 | 38 | 0 |
| 2000 | 52 | 0 |
| 2001 | 48 | 15 |
| 2002 | 43 | 52 |
| 2003 | 57 | 54 |
| 2004 | 35 | 61 |
| 2005 | 35 | 57 |
| 2006 | 48 | 49 |
| 2007 | 38 | 51 |
| 2008 | 37 | 55 |
| 2009 | 53 | 64 |
| 2010 | 63 | 81 |
| 2011 | 66 | 71 |
| 2012 | 30 | 71 |
| 2013 | 75 | 62 |
| 2014 | 70 | 89 |
| 2015 | 68 | 73 |
| 2016 | 52 | 73 |
| 2017 | 70 | 91 |
| 2018 | 73 | 97 |
| 2019 | 101 | 96 |
| 2020 | 99 | 103 |
| 2021 | 72 | 87 |
| 2022 | 69 | 100 |
| 2023 | 61 | 106 |
| 2024 | 64 | 119 |
| 2025 | 63 | 100 |
| 2026 | 46 | 73 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C01B 17/02Preparation of sulfur1,440
- C01B 17/69Sulfur trioxide635
- C01B 17/48Sulfur dioxide446
- C01B 17/16Hydrogen sulfides284
- C01B 17/20Methods for preparing sulfides or polysulfides, in general267
- C01B 17/22Alkali metal sulfides or polysulfides203
- C01B 17/64Thiosulfates128
- C01B 17/45Compounds containing sulfur and halogen, with or without oxygen72
All 13 subgroupsShow fewer
- C01B 17/96Methods for the preparation of sulfates in general70
- C01B 17/42Sulfides or polysulfides of magnesium, calcium, strontium, or barium47
- C01B 17/62Methods of preparing sulfites in general19
- C01B 17/46Compounds containing sulfur, halogen, hydrogen, and oxygen4
- C01B 17/98Sulfur: other compounds containing sulfur and oxygen3
Recent patents
- System and method of treatment of gas contaminated with hydrogen sulfide and the reduction of hydrogen sulfide associated odor29 Sep 2026US 12,746,506 B2Streamline Innovations Inc
- Catalyst medium comprising hollow microspheres22 Sep 2026US 12,741,267 B2Axens
- Resource utilization method of crude sodium sulfate22 Sep 2026US 12,741,871 B2Hunan Fortune Environmental Technology Co., LTD.
- Sulfide-based composite solid state electrolytes and related methods15 Sep 2026US 12,735,318 B2Rivian IP Holdings, LLC
- Producing hydrogen from hydrogen sulfide1 Sep 2026US 12,722,970 B2Saudi Arabian Oil Company
- Method for producing lithium sulfide for solid electrolyte8 Oct 2026US 2026/0307991 A1SK On Co., Ltd.
- Reactor system and method thereof for degassing sulfur1 Oct 2026US 2026/0296887 A1Fluor Technologies Corporation
- Simultaneous production method of lithium hydroxide and sulfuric acid1 Oct 2026US 2026/0296908 A1Posco Holdings Inc.
- Use of polyether siloxanes as processing aids for melt granulation1 Oct 2026US 2026/0297340 A1Evonik Operations GmbH
- Sulfur dioxide mixture-filled container and sulfur dioxide composition1 Oct 2026US 2026/0298410 A1Sumitomo Seika Chemicals Co., Ltd.
Most cited
By later US patents
- Highly luminescent color-selective nano-crystalline materials747US 6,322,901 B1Massachusetts Institute of Technology · 2001
- Highly luminescent color-selective materials and method of making thereof406US 6,207,229 B1Massachusetts Institute of Technology · 2001
- Preparation of nanocrystallites375US 6,576,291 B2Massachusetts Institute of Technology · 2003
- Composite hydrogen separation element and module185US 5,498,278 ABend Research, Inc. · 1996
- Highly luminescent color selective nanocrystalline materials171US 6,861,155 B2Massachusetts Institute of Technology · 2005