A61K 31/33
Heterocyclic compounds
A61K31/33 (Heterocyclic compounds) appears on 80,826 US grants and 139,757 published applications in this corpus.
Search patents in A61K- Granted patents
- 80,826
- Published applications
- 139,757
- Assignees
- 25,362
- Inventors
- 174,828
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 345 | 0 |
| 1977 | 255 | 0 |
| 1978 | 206 | 0 |
| 1979 | 150 | 0 |
| 1980 | 194 | 0 |
| 1981 | 200 | 0 |
| 1982 | 140 | 0 |
| 1983 | 158 | 0 |
| 1984 | 191 | 0 |
| 1985 | 167 | 0 |
| 1986 | 208 | 0 |
| 1987 | 234 | 0 |
| 1988 | 272 | 0 |
| 1989 | 384 | 0 |
| 1990 | 422 | 0 |
| 1991 | 396 | 0 |
| 1992 | 404 | 0 |
| 1993 | 498 | 0 |
| 1994 | 412 | 0 |
| 1995 | 520 | 0 |
| 1996 | 726 | 0 |
| 1997 | 986 | 0 |
| 1998 | 1013 | 0 |
| 1999 | 1185 | 0 |
| 2000 | 1151 | 0 |
| 2001 | 1365 | 544 |
| 2002 | 1491 | 2185 |
| 2003 | 1415 | 3149 |
| 2004 | 1009 | 3793 |
| 2005 | 965 | 3758 |
| 2006 | 1160 | 3789 |
| 2007 | 929 | 3570 |
| 2008 | 916 | 3705 |
| 2009 | 982 | 3879 |
| 2010 | 1480 | 4591 |
| 2011 | 1611 | 4592 |
| 2012 | 2012 | 4552 |
| 2013 | 2937 | 5620 |
| 2014 | 3724 | 6876 |
| 2015 | 4267 | 7120 |
| 2016 | 4380 | 7192 |
| 2017 | 4855 | 7277 |
| 2018 | 4479 | 6885 |
| 2019 | 4664 | 7174 |
| 2020 | 4559 | 7379 |
| 2021 | 4225 | 7334 |
| 2022 | 3745 | 7277 |
| 2023 | 3319 | 7197 |
| 2024 | 3478 | 7582 |
| 2025 | 3532 | 7214 |
| 2026 | 2510 | 5523 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and apparatus for delivering an API-containing liquid to an edible substrate6 Oct 2026US 12,751,915 B2Transport Authority, Inc.
- Liposomal enhanced intra-peritoneal chemotherapy6 Oct 2026US 12,751,919 B2
- Medication that protects the intestinal microbiota and their preparation methods and applications6 Oct 2026US 12,751,921 B2University of Science and Technology of China
- Assisted loading of hydrophobic molecules into liposomes6 Oct 2026US 12,751,922 B2University of Connecticut
- Nanostructure or microstructure and method for producing same6 Oct 2026US 12,751,923 B2The University of Tokyo
- Tea compositions comprising paraxanthine and methods of production thereof8 Oct 2026US 2026/0305643 A1
- Interface structure for a bioelectrode8 Oct 2026US 2026/0306000 A1Teknologian tutkimuskeskus VTT Oy
- Hyaluronic acid hydrogels with agent to enhance resorption8 Oct 2026US 2026/0306398 A1Boston Scientific Scimed, Inc.
- Formulation for an effective oral administration of ciclopirox with no adversal gastrointestinal toxicity8 Oct 2026US 2026/0306400 A1AsociacióN Centro De InvestigacióN Cooperativa En Biociencias-Cic Biogune
- Suspension containing heterocyclidene acetamide derivative8 Oct 2026US 2026/0306401 A1Mochida Pharmaceutical Co., Ltd.
Most cited
By later US patents
- Sustained release systems of ascorbic acid phosphate1,391US 8,034,363 B2Advanced Technologies and Regenerative Medicine, LLC · 2011
- Energetically-controlled delivery of biologically active material from an implanted medical device1,268US 7,101,394 B2Boston Scientific Scimed, Inc. · 2006
- Wound dressing with conformable elastomeric wound contact layer1,263US 5,445,604 ASmith and Nephew Associated Companies Limited · 1995
- Spine distraction implant and method1,139US 5,836,948 ASaint Francis Medical Technologies, LLC · 1998
- Method of treating androgen independent prostate cancer1,091US 9,040,574 B2Natrogen Therapeutics International, Inc. · 2015