A61K 51/1251
Micro- or nanospheres, micro- or nanobeads, micro- or nanocapsules
Official title: {micro- or nanospheres, micro- or nanobeads, micro- or nanocapsules}
A61K51/1251 (Micro- or nanospheres, micro- or nanobeads, micro- or nanocapsules) appears on 98 US grants and 186 published applications in this corpus.
Search patents in A61K- Granted patents
- 98
- Published applications
- 186
- Assignees
- 117
- Inventors
- 468
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 3 |
| 2003 | 1 | 3 |
| 2004 | 0 | 5 |
| 2005 | 2 | 1 |
| 2006 | 1 | 4 |
| 2007 | 0 | 4 |
| 2008 | 1 | 6 |
| 2009 | 1 | 6 |
| 2010 | 0 | 4 |
| 2011 | 1 | 6 |
| 2012 | 2 | 3 |
| 2013 | 3 | 8 |
| 2014 | 4 | 8 |
| 2015 | 4 | 17 |
| 2016 | 12 | 13 |
| 2017 | 8 | 8 |
| 2018 | 6 | 8 |
| 2019 | 4 | 7 |
| 2020 | 6 | 9 |
| 2021 | 6 | 13 |
| 2022 | 1 | 7 |
| 2023 | 3 | 14 |
| 2024 | 8 | 11 |
| 2025 | 7 | 13 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multifunctional microsphere preparation for chemoembolization therapy and imaging of tumors, and preparation method therefor17 Feb 2026US 12,551,442 B2Fudan University
- Treatment of CNS tumors27 Jan 2026US 12,533,431 B2Boston Scientific Medical Device Limited
- Particles functionalized with imageable radioisotopes and methods of making and use thereof14 Oct 2025US 12,440,587 B2Boston Scientific Medical Device Limited
- Connector assemblies9 Sep 2025US 12,409,309 B2Bard Peripheral Vascular, Inc.
- Radionuclide-loaded nanoparticles for focal tissue ablation17 Jun 2025US 12,329,831 B2Translational and Fundamental Technologies Institute LLC
- Methods of Treating and Preventing Cancer with Alternating Electric Fields, Radioactive Particles, and Systemic Therapy24 Sep 2026US 2026/0284431 A1Novocure GmbH
- Treatment of cns tumors30 Apr 2026US 2026/0115338 A1Boston Scientific Medical Device Limited
- Cancer therapy delivery system with tumbling container for suspension generation9 Apr 2026US 2026/0096951 A1Boston Scientific Scimed, Inc.
- Suspension containing radioactive microspheres, and preparation method therefor and use thereof2 Apr 2026US 2026/0091149 A1Chengdu Shetai Medical Technology Co., Ltd.
- Methods of measuring fluorescence and capturing movement in animals5 Feb 2026US 2026/0033936 A1Emory University
Most cited
By later US patents
- Biodegradable injectable nanoparticles724US 5,543,158 AMassachusetts Institute of Technology · 1996
- Magnetic iron-dextran microspheres466US 4,452,773 ACanadian Patents and Development Limited · 1984
- Nanoparticles and microparticles of non-linear hydrophilic-hydrophobic multiblock copolymers257US 5,578,325 AMassachusetts Institute of Technology · 1996
- Biodegradable injectable particles for imaging247US 5,565,215 AMassachusettes Institute of Technology · 1996
- Nanocrystalline magnetic iron oxide particles-method for preparation and use in medical diagnostics and therapy101US 5,427,767 AInstitut fur Diagnostikforschung GmbH an der Freien Universitat Berlin · 1995