B01J 2531/23
Calcium
B01J2531/23 (Calcium) appears on 56 US grants and 39 published applications in this corpus.
Search patents in B01J- Granted patents
- 56
- Published applications
- 39
- Assignees
- 43
- Inventors
- 146
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 3 |
| 2005 | 1 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 2 | 4 |
| 2011 | 0 | 3 |
| 2012 | 3 | 2 |
| 2013 | 2 | 0 |
| 2014 | 0 | 3 |
| 2015 | 3 | 1 |
| 2016 | 3 | 4 |
| 2017 | 0 | 3 |
| 2018 | 3 | 1 |
| 2019 | 2 | 3 |
| 2020 | 3 | 2 |
| 2021 | 1 | 1 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 1 | 2 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Catalysts for synthesizing cyclic carbonates, preparation methods and uses thereof23 Dec 2025US 12,502,661 B2Anhui Conch Material Technology Co., Ltd.
- Preparation method of embedded alkaline earth metal oxide solid alkali and application thereof in biodiesel production21 May 2024US 11,986,814 B2Shandong Jianzhu University
- Catalysts and methods for enantioselective conjugate addition of amines to unsaturated electrophiles12 Dec 2023US 11,840,514 B2Northwestern University
- Multidentate ligands and use thereof20 Jul 2021US 11,065,608 B2The Trustees of Columbia University in the City of New York
- Catalysts and methods for enantioselective conjugate additions of amines to unsaturated electrophiles22 Sep 2020US 10,781,172 B2Northwestern University
- Catalysts for synthesizing cyclic carbonates, preparation methods and uses thereof20 Nov 2025US 2025/0352989 A1Anhui Conch Material Technology Co., Ltd.
- Process for depolymerizing polyethylene terephthalate by glycolysis25 Jul 2024US 2024/0246897 A1Aquafil S.P.A.
- Apparatus and method for converting carbon dioxide to sugars8 Feb 2024US 2024/0043464 A1Air Company Holdings, Inc.
- Preparation method of embedded alkaline earth metal oxide solid alkali and application thereof in biodiesel production22 Sep 2022US 2022/0297107 A1Shandong Jianzhu University
- Catalysts and methods for enantioselecive conjugate addition of amines to unsaturated electrophiles7 Jan 2021US 2021/0002221 A1Northwestern University
Most cited
By later US patents
- Texaphyrin-oligonucleotide conjugates308US 5,587,371 ABoard of Trustees, Univ. of TX Sys. · 1996
- Substituted porphyrins, porphyrin-containing polymers, and synthetic methods therefor61US 5,371,199 AThe Trustees of the University of Pennsylvania · 1994
- Ring-metalated porphyrins56US 5,493,017 AThe Trustees of the University of Pennsylvania · 1996
- Hydroxylated texaphyrins45US 5,457,183 ABoard of Regents, The University of Texas System · 1995
- Porous organo-metallic skeleton material containing an additional polymer36US 7,815,716 B2BASF SE · 2010