C05B 11/08
Using sulfuric acid
Official title: using sulfuric acid
C05B11/08 (Using sulfuric acid) appears on 35 US grants and 22 published applications in this corpus.
Search patents in C05B- Granted patents
- 35
- Published applications
- 22
- Assignees
- 28
- Inventors
- 97
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 0 | 1 |
| 2020 | 1 | 3 |
| 2021 | 3 | 1 |
| 2022 | 0 | 5 |
| 2023 | 2 | 4 |
| 2024 | 2 | 2 |
| 2025 | 3 | 2 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process to convert reduced sulfur species and water into hydrogen and sulfuric acid28 Apr 2026US 12,612,701 B2California Institute of Technology
- Coherent dispersible granules and methods for forming coherent dispersible granules3 Mar 2026US 12,565,456 B2Phospholution Inc.
- Integrated ammonia and sulfuric acid production plant and process20 Jan 2026US 12,528,752 B2Chemetics Inc.
- NOx removal from gaseous effluents9 Sep 2025US 12,410,108 B2Yara International Asa
- Preparation of an aqueous suspension of phosphate material11 Feb 2025US 12,221,342 B2Coatex
- A mineral phosphate ash based fertilizer and a process for the production thereof23 Apr 2026US 2026/0109656 A1
- Method for producing phosphoric acid22 May 2025US 2025/0162870 A1
- Fertilizer and manufacturing method thereof22 May 2025US 2025/0162955 A1
- Production of sulfuric acid employing an o2 rich stream19 Dec 2024US 2024/0417256 A1Topsoe A/S
- Coherent dispersible granules and methods for forming coherent dispersible granules31 Oct 2024US 2024/0360050 A1Phospholution Inc.
Most cited
By later US patents
- Granulated nitrogen-phosphorus-potassium-sulfur fertilizer from waste gypsum slurry11US 5,158,594 A1992
- Process for production of fertilizers10US 4,073,634 A1978
- Method of producing fluoride-free phosphoric acid8US 4,055,626 APennzoil Company · 1977
- Process for production of fertilizers8US 4,252,553 A1981
- Process for the production of phospho-nitrogenous products and products thus obtained8US 5,409,516 AGrande-Paroisse S.A. · 1995