B01J 31/0257
Phosphorus acids or phosphorus acid esters
Official title: {Phosphorus acids or phosphorus acid esters}
B01J31/0257 (Phosphorus acids or phosphorus acid esters) appears on 165 US grants and 106 published applications in this corpus.
Search patents in B01J- Granted patents
- 165
- Published applications
- 106
- Assignees
- 122
- Inventors
- 413
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 19 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 1 | 1 |
| 2002 | 9 | 6 |
| 2003 | 4 | 5 |
| 2004 | 0 | 0 |
| 2005 | 3 | 7 |
| 2006 | 3 | 3 |
| 2007 | 2 | 3 |
| 2008 | 1 | 1 |
| 2009 | 4 | 2 |
| 2010 | 2 | 1 |
| 2011 | 1 | 4 |
| 2012 | 0 | 2 |
| 2013 | 2 | 6 |
| 2014 | 3 | 2 |
| 2015 | 4 | 6 |
| 2016 | 4 | 4 |
| 2017 | 1 | 4 |
| 2018 | 6 | 8 |
| 2019 | 4 | 4 |
| 2020 | 4 | 6 |
| 2021 | 1 | 7 |
| 2022 | 7 | 12 |
| 2023 | 6 | 3 |
| 2024 | 5 | 5 |
| 2025 | 8 | 2 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01J 31/0259Comprising phosphorous acid groups or the isomeric phosphonic acid groups , i.e.85
- B01J 31/0258Phosphoric acid mono-, di- or triesters , i.e. r= c, r'= c52
- B01J 31/0261Comprising phosphonous acid groups or the isomeric phosphinic acid groups , i.e.26
- B01J 31/0262Comprising phosphinous acid groups or the isomeric phosphine oxide groups , i.e.26
Recent patents
- Formation of n-protected 3,6-bis-(4-aminoalkyl)-2,5,diketopiperazine4 Nov 2025US 12,459,903 B2MannKind Corporation
- Method of producing acrylonitrile dimer2 Sep 2025US 12,404,234 B2LG Chem.Ltd.
- Method for preparing acrylonitrile dimer22 Jul 2025US 12,365,647 B2LG Chem.Ltd.
- Methods for enantioselective preparation of chiral tetraarylmethanes24 Jun 2025US 12,338,193 B2The Hong Kong University of Science and Technology
- Organic catalyst for non-aqueous aldol condensation17 Jun 2025US 12,331,012 B2Dow Global Technologies LLC
- Low-odor phosphazene catalyst and use thereof30 Apr 2026US 2026/0115705 A1Changhua Chemical Technology Co., Ltd.
- Formation of N-Protected 3,6-bis-(4-aminoalkyl)-2,5,diketopiperazine12 Feb 2026US 2026/0042739 A1MannKind Corporation
- Formation of N-Protected 3,6-bis-(4-aminoalkyl)-2,5,diketopiperazine22 May 2025US 2025/0163003 A1MannKind Corporation
- Branched Products6 Mar 2025US 2025/0074849 A1SCION Holdings LLC
- Methods of preparing chiral amino acids21 Nov 2024US 2024/0383842 A1Laboratory for Synthetic Chemistry and Chemical Biology Limited
Most cited
By later US patents
- Titanium-containing catalyst composition and processes therefor and therewith46US 6,066,714 AE. I. Du Pont de Nemours and Company · 2000
- Preparation of zerovalent nickel complexes42US 4,416,825 AE. I. Du Pont de Nemours and Company · 1983
- Esterification catalysts and processes therefor and therewith42US 6,166,170 AE. I. Du Pont de Nemours and Company · 2000
- Separation processes39US 5,952,530 AUnion Carbide Chemicals & Plastics Technology Corporation · 1999
- Heterolamellar photoelectrochemical films and devices35US 5,695,890 AThe Trustees of Princeton University · 1997