C01B 25/185
Preparation neither from elemental phosphorus or phosphoric anhydride nor by reacting phosphate-containing
Official title: {Preparation neither from elemental phosphorus or phosphoric anhydride nor by reacting phosphate-containing material with an acid, e.g. by reacting phosphate-containing material with an ion-exchange resin or an acid salt used alone}
C01B25/185 (Preparation neither from elemental phosphorus or phosphoric anhydride nor by reacting phosphate-containing) appears on 13 US grants and 10 published applications in this corpus.
Search patents in C01B- Granted patents
- 13
- Published applications
- 10
- Assignees
- 7
- Inventors
- 22
- Latest grant
- 8 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 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 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 5 |
| 2017 | 1 | 1 |
| 2018 | 2 | 0 |
| 2019 | 2 | 0 |
| 2020 | 1 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method to make phosphoric acid and ammonium phosphates from phosphate minerals8 Jul 2025US 12,351,456 B2Wisconsin Alumni Research Foundation
- Method to make phosphoric acid and ammonium phosphates from phosphate minerals8 Jun 2021US 11,027,975 B2Wisconsin Alumni Research Foundation
- Raw material pre-treatment method and raw material pre-treatment process system suitable for kiln phosphoric acid process18 Aug 2020US 10,744,512 B2Sichuan Ko Chang Technology Co., Ltd.
- Raw material of composite pellets used in kiln phosphoric acid process, and forming method therefor8 Oct 2019US 10,435,300 B2Sichuan Ko Chang Technology Co., Ltd.
- Method of phosphorus removal and recovery16 Jul 2019US 10,351,428 B2Hsy Helsingin Seudun YmpäRistöPalvelut-Kuntayhtymä
- Method to make phosphoric acid and ammonium phosphates from phosphate mineral23 Apr 2026US 2026/0109602 A1Wisconsin Alumni Research Foundation
- Method for preparing cremation crystals using catalyst obtained through reduction of phosphorus in skeletal remains19 Sep 2024US 2024/0309539 A1
- Method to make phosphoric acid and ammonium phosphates from phosphate minerals23 Sep 2021US 2021/0292169 A1Wisconsin Alumni Research Foundation
- Method to make phosphoric acid and ammonium phosphates from phosphate minerals6 Aug 2020US 2020/0247674 A1Wisconsin Alumni Research Foundation
- Method of phosphorus removal and recovery28 Sep 2017US 2017/0275167 A1Hsy Helsingin Seudun YmpäRistöPalvelut-Kuntayhtymä
Most cited
By later US patents
- Process for obtaining pure orthophosphoric acid from superphosphoric acid8US 4,083,934 ATexasgulf Inc. · 1978
- Production of fluoride-free phosphates8US 4,086,322 APennzoil Company · 1978
- Production of fluoride-free phosphates8US 4,222,990 APennzoil Company · 1980
- Process for producing hydrogen fluoride and phosphoric acid4US 4,292,289 AClimax Chemical Company · 1981
- Method for mass production of phosphoric acid with rotary kiln3US 10,005,669 B2Sichuan Ko Chang Technology Co., Ltd. · 2018