C01B 25/322
Preparation by neutralisation of orthophosphoric acid
Official title: {Preparation by neutralisation of orthophosphoric acid}
C01B25/322 (Preparation by neutralisation of orthophosphoric acid) appears on 117 US grants and 79 published applications in this corpus.
Search patents in C01B- Granted patents
- 117
- Published applications
- 79
- Assignees
- 83
- Inventors
- 258
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 2 |
| 2006 | 1 | 2 |
| 2007 | 4 | 4 |
| 2008 | 2 | 3 |
| 2009 | 0 | 3 |
| 2010 | 2 | 5 |
| 2011 | 0 | 3 |
| 2012 | 1 | 3 |
| 2013 | 3 | 4 |
| 2014 | 2 | 3 |
| 2015 | 3 | 3 |
| 2016 | 6 | 3 |
| 2017 | 5 | 6 |
| 2018 | 3 | 5 |
| 2019 | 1 | 4 |
| 2020 | 4 | 7 |
| 2021 | 2 | 3 |
| 2022 | 5 | 5 |
| 2023 | 1 | 2 |
| 2024 | 1 | 6 |
| 2025 | 5 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Hydroxyapatite powder and method for producing same30 Sep 2025US 12,428,298 B2Chemische Fabrik Budenheim KG
- Phosphate-containing anti-corrosive pigment23 Sep 2025US 12,421,116 B2Chemische Fabrik Budenheim KG
- Microbial assisted phosphorous recovery under anaerobic condition8 Jul 2025US 12,351,496 B2The Governors of the University of Alberta
- Production of surface-reacted calcium salts by grinding induced conversion17 Jun 2025US 12,331,200 B2Omya International AG
- Hydroxyapatite, cosmetic, food, and method for producing the same21 Jan 2025US 12,201,709 B2Brainy Inc.
- Phosphate-containing anti-corrosive pigment21 Aug 2025US 2025/0263298 A1Chemische Fabrik Budenheim KG
- Powder, method of producing powder and adsorption apparatus13 Feb 2025US 2025/0050306 A1Hoya Corporation
- Polymer-templated hydroxyapatite and uses thereof for purification of target molecules7 Nov 2024US 2024/0367142 A1Bio-Rad Laboratories, Inc.
- Apparatus and method for preparing hydroxyapatite suspension10 Oct 2024US 2024/0336483 A1Brainy Inc.
- Method for preparing whitlockite crystals without generation of hydroxyapatite crystals8 Aug 2024US 2024/0262690 A1H&Bio Co., Ltd.
Most cited
By later US patents
- In situ calcium phosphate minerals--method and composition218US 4,880,610 ANorian Corporation · 1989
- Intimate mixture of calcium and phosphate sources as precursor to hydroxyapatite199US 5,053,212 ANorian Corporation · 1991
- Situ prepared calcium phosphate composition and method159US 5,336,264 ANorian Corporation · 1994
- In situ calcium phosphate minerals method151US 5,047,031 ANorian Corporation · 1991
- Methods for in situ prepared calcium phosphate minerals147US 5,129,905 ANorian Corporation · 1992