A61K 9/50
Microcapsules having a gas, liquid or semi-solid filling
Official title: Microcapsules {having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals (A61K9/2081 takes precedence; particles with a single coating comprising drug A61K9/167)}
A61K9/50 (Microcapsules having a gas, liquid or semi-solid filling) appears on 9,798 US grants and 17,728 published applications in this corpus.
Search patents in A61K- Granted patents
- 9,798
- Published applications
- 17,728
- Assignees
- 5,629
- Inventors
- 29,587
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 11 | 0 |
| 1978 | 19 | 0 |
| 1979 | 15 | 0 |
| 1980 | 22 | 0 |
| 1981 | 20 | 0 |
| 1982 | 30 | 0 |
| 1983 | 19 | 0 |
| 1984 | 22 | 0 |
| 1985 | 21 | 0 |
| 1986 | 23 | 0 |
| 1987 | 51 | 0 |
| 1988 | 48 | 0 |
| 1989 | 90 | 0 |
| 1990 | 83 | 0 |
| 1991 | 67 | 0 |
| 1992 | 66 | 0 |
| 1993 | 84 | 0 |
| 1994 | 80 | 0 |
| 1995 | 86 | 0 |
| 1996 | 92 | 0 |
| 1997 | 141 | 0 |
| 1998 | 115 | 0 |
| 1999 | 120 | 0 |
| 2000 | 109 | 0 |
| 2001 | 146 | 54 |
| 2002 | 124 | 197 |
| 2003 | 173 | 324 |
| 2004 | 107 | 333 |
| 2005 | 76 | 334 |
| 2006 | 98 | 382 |
| 2007 | 74 | 389 |
| 2008 | 81 | 429 |
| 2009 | 76 | 433 |
| 2010 | 138 | 570 |
| 2011 | 162 | 563 |
| 2012 | 223 | 492 |
| 2013 | 314 | 630 |
| 2014 | 412 | 781 |
| 2015 | 431 | 795 |
| 2016 | 481 | 924 |
| 2017 | 558 | 871 |
| 2018 | 480 | 829 |
| 2019 | 594 | 974 |
| 2020 | 533 | 992 |
| 2021 | 554 | 990 |
| 2022 | 504 | 1039 |
| 2023 | 495 | 1067 |
| 2024 | 537 | 1199 |
| 2025 | 588 | 1180 |
| 2026 | 391 | 957 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- A61K 9/51Nanocapsules4,360
- A61K 9/5005Wall or coating material4,357
- A61K 9/5073Having two or more different coatings optionally including drug-containing subcoatings1,927
- A61K 9/5089Processes1,018
- A61K 9/5084Mixtures of one or more drugs in different galenical forms, at least880
- A61K 9/5094Microcapsules containing magnetic carrier material217
Recent patents
- Methods of forming an encapsulated core material, an encapsulated material, compositions uses thereof6 Oct 2026US 12,751,902 B2
- Polysaccharide encapsulated oxygen nanobubbles6 Oct 2026US 12,751,927 B2The Board of Trustees of the University of Illinois
- Prolonged-release pharmaceutical composition for oral administration of sultiame6 Oct 2026US 12,751,928 B2Advicenne
- Engineered cells and uses thereof6 Oct 2026US 12,751,929 B2Ohio State Innovation Foundation
- Cell-receptor targeted exosomes6 Oct 2026US 12,751,930 B2City of Hope
- Steroid-cationic lipid compound and use thereof8 Oct 2026US 2026/0306406 A1Cansino (Shanghai) Biological Research Co., Ltd.
- Modular multiplatform system for mrna drug production8 Oct 2026US 2026/0306407 A1BioNTech SE
- Composition and Method for Topical Trans-spinal Delivery of Nucleic Acids and Small Molecules8 Oct 2026US 2026/0306414 A13P Biotechnologies, Inc.
- Active loading of biomolecular cargo into engineered vesicles8 Oct 2026US 2026/0306415 A1Northwestern University
- Extracellular vesicles for the delivery of payloads to eukaryotic cells8 Oct 2026US 2026/0306416 A1Alaya.bio Inc.
Most cited
By later US patents
- Pharmaceutical compositions containing a magnetically detectable material1,481US 5,079,006 AAprex Corporation · 1992
- Particle immobilized coatings and uses thereof1,386US 8,679,454 B2SurModics, Inc. · 2014
- Absorbent articles comprising nanoparticles1,110US 7,988,779 B2McNeil-PPC, Inc. · 2011
- Controlled release formulations coated with aqueous dispersions of acrylic polymers1,011US 5,639,476 AEuro-Celtique S. A. · 1997
- Anti-angiogenic compositions and methods of use968US 5,716,981 AAngiogenesis Technologies, Inc. · 1998