C01B 25/32
Phosphates of magnesium, calcium, strontium, or barium
C01B25/32 (Phosphates of magnesium, calcium, strontium, or barium) appears on 467 US grants and 437 published applications in this corpus.
Search patents in C01B- Granted patents
- 467
- Published applications
- 437
- Assignees
- 383
- Inventors
- 1,186
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 5 | 0 |
| 1978 | 10 | 0 |
| 1979 | 9 | 0 |
| 1980 | 8 | 0 |
| 1981 | 6 | 0 |
| 1982 | 7 | 0 |
| 1983 | 3 | 0 |
| 1984 | 9 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 8 | 0 |
| 1989 | 6 | 0 |
| 1990 | 7 | 0 |
| 1991 | 8 | 0 |
| 1992 | 7 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 9 | 0 |
| 1996 | 7 | 0 |
| 1997 | 10 | 0 |
| 1998 | 5 | 0 |
| 1999 | 6 | 0 |
| 2000 | 11 | 0 |
| 2001 | 9 | 2 |
| 2002 | 6 | 9 |
| 2003 | 7 | 10 |
| 2004 | 3 | 7 |
| 2005 | 4 | 19 |
| 2006 | 9 | 12 |
| 2007 | 7 | 16 |
| 2008 | 8 | 12 |
| 2009 | 6 | 13 |
| 2010 | 12 | 24 |
| 2011 | 10 | 17 |
| 2012 | 11 | 16 |
| 2013 | 14 | 17 |
| 2014 | 13 | 15 |
| 2015 | 9 | 23 |
| 2016 | 14 | 18 |
| 2017 | 17 | 23 |
| 2018 | 18 | 21 |
| 2019 | 16 | 24 |
| 2020 | 19 | 33 |
| 2021 | 20 | 30 |
| 2022 | 14 | 18 |
| 2023 | 13 | 15 |
| 2024 | 13 | 16 |
| 2025 | 15 | 19 |
| 2026 | 9 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C01B 25/322Preparation by neutralisation of orthophosphoric acid117
- C01B 25/327After-treatment103
- C01B 25/325Preparation by double decomposition43
- C01B 25/321Methods for converting an alkaline earth metal ortho-phosphate into another ortho-phosphate31
- C01B 25/324Preparation from a reaction solution obtained by acidifying with an acid other28
- C01B 25/34Magnesium phosphates23
- C01B 25/328Defluorination during or after the preparation17
Recent patents
- Method for preparing whitlockite, and whitlockite prepared thereby30 Jun 2026US 12,668,490 B2The Industry & Academic Corporation in Chungnam National University (IAC)
- Methods of use and manufacture of silver-doped, nano-porous hydroxyapatite9 Jun 2026US 12,649,143 B2Mo-Sci Corporation
- Recovery of commercial substances from apatite mineral5 May 2026US 12,617,691 B2Easymining Sweden AB
- Calcium phosphate-based core-shell structured material, method for preparing the same, and oral care composition using the same7 Apr 2026US 12,595,175 B23D Global Biotech Inc.
- Coralline hydroxyapatite and preparation method thereof17 Mar 2026US 12,576,184 B1WitKang Zhiyuan Medical Devices (Xi'an) Co., Ltd.
- Ion substituted calcium phosphate particles24 Sep 2026US 2026/0285684 A1Psilox AB
- Spherical nanoparticles for improved composite materials6 Aug 2026US 2026/0225889 A1Stichting Radboud universitair medisch centrum
- Process for the recovery of a useful material from a battery30 Jul 2026US 2026/0217534 A1Materials Processing Institute
- Method to make phosphoric acid and ammonium phosphates from phosphate mineral23 Apr 2026US 2026/0109602 A1Wisconsin Alumni Research Foundation
- Artificial bone repair material, porous magnesium-containing tricalcium phosphate powder and preparation method therefor19 Mar 2026US 2026/0077106 A1Changzhou Bone-Renewal Medical Technologies LLC.
Most cited
By later US patents
- Bioresorbable ceramic composites294US 6,027,742 AEtex Corporation · 2000
- Bioresorbable ceramic composites284US 6,331,312 B1Etex Corporation · 2001
- Nanocrystalline apatites and composites, prostheses incorporating them, and method for their production242US 6,013,591 AMassachusetts Institute of Technology · 2000
- Bone substitution material and a method of its manufacture232US 6,214,368 B1Etex Corporation · 2001
- In situ calcium phosphate minerals--method and composition218US 4,880,610 ANorian Corporation · 1989