A61K 47/585
Ion exchange resins
Official title: {Ion exchange resins, e.g. polystyrene sulfonic acid resin}
A61K47/585 (Ion exchange resins) appears on 203 US grants and 249 published applications in this corpus.
Search patents in A61K- Granted patents
- 203
- Published applications
- 249
- Assignees
- 142
- Inventors
- 473
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 10 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 7 | 0 |
| 2002 | 1 | 6 |
| 2003 | 3 | 6 |
| 2004 | 1 | 9 |
| 2005 | 0 | 16 |
| 2006 | 4 | 13 |
| 2007 | 0 | 10 |
| 2008 | 0 | 10 |
| 2009 | 0 | 8 |
| 2010 | 2 | 7 |
| 2011 | 4 | 5 |
| 2012 | 10 | 7 |
| 2013 | 14 | 15 |
| 2014 | 11 | 22 |
| 2015 | 11 | 17 |
| 2016 | 6 | 15 |
| 2017 | 13 | 18 |
| 2018 | 3 | 5 |
| 2019 | 5 | 10 |
| 2020 | 6 | 3 |
| 2021 | 7 | 12 |
| 2022 | 3 | 8 |
| 2023 | 2 | 9 |
| 2024 | 3 | 7 |
| 2025 | 2 | 6 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Modified release drug powder composition comprising gastro-retentive raft forming systems having trigger pulse drug release21 Apr 2026US 12,605,333 B2Tris Pharma, Inc.
- Oral thin films3 Feb 2026US 12,539,280 B2University of Strathclyde
- Low sodium oxybate once nightly composition27 Jan 2026US 12,533,314 B2Tris Pharma, Inc.
- Pharmaceutical compositions comprising a floating interpenetrating polymer network forming system6 Jan 2026US 12,514,818 B2Tris Pharma, Inc.
- Pharmaceutical composition comprising GHB gastro-retentive raft forming systems having trigger pulse drug release21 Jan 2025US 12,201,720 B2Tris Pharma, Inc.
- Directed biosynthesis of modified anthraquinone-fused enediynes as potential cancer therapeutics30 Jul 2026US 2026/0216352 A1The Johns Hopkins University
- Modified release drug powder composition comprising gastro-retentive raft forming systems having trigger pulse drug release16 Jul 2026US 2026/0199230 A1Tris Pharma, Inc.
- Low Sodium Oxybate Once Nightly Composition18 Jun 2026US 2026/0165962 A1Tris Pharma, Inc.
- Pharmaceutical compositions comprising a floating interpenetrating polymer network forming system9 Apr 2026US 2026/0096986 A1Tris Pharma, Inc.
- Nonsteroidal anti-inflammatory drug complexes and methods of making and using1 Jan 2026US 2026/0000772 A1Areca BSC Development, LLC
Most cited
By later US patents
- Use of combinations gelling polysaccharides and finely divided drug carrier substrates in topical ophthalmic compositions334US 5,212,162 AAlcon Laboratories, Inc. · 1993
- Sustained release, comfort formulation for glaucoma therapy329US 4,911,920 AAlcon Laboratories, Inc. · 1990
- Prolonged release pharmaceutical preparations204US 4,221,778 APennwalt Corporation · 1980
- Pharmaceutical ion exchange resin composition190US 5,071,646 AEuroceltique, S.A. · 1991
- Sustained release drug-resin complexes176US 4,996,047 ARichardson-Vicks Inc. · 1991