A61K 31/335
Having oxygen as the only ring hetero atom
Official title: having oxygen as the only ring hetero atom, e.g. fungichromin
A61K31/335 (Having oxygen as the only ring hetero atom) appears on 16,331 US grants and 29,403 published applications in this corpus.
Search patents in A61K- Granted patents
- 16,331
- Published applications
- 29,403
- Assignees
- 9,476
- Inventors
- 48,390
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 39 | 0 |
| 1977 | 35 | 0 |
| 1978 | 35 | 0 |
| 1979 | 28 | 0 |
| 1980 | 35 | 0 |
| 1981 | 27 | 0 |
| 1982 | 19 | 0 |
| 1983 | 21 | 0 |
| 1984 | 22 | 0 |
| 1985 | 15 | 0 |
| 1986 | 36 | 0 |
| 1987 | 30 | 0 |
| 1988 | 31 | 0 |
| 1989 | 60 | 0 |
| 1990 | 64 | 0 |
| 1991 | 66 | 0 |
| 1992 | 68 | 0 |
| 1993 | 82 | 0 |
| 1994 | 96 | 0 |
| 1995 | 108 | 0 |
| 1996 | 151 | 0 |
| 1997 | 256 | 0 |
| 1998 | 230 | 0 |
| 1999 | 254 | 0 |
| 2000 | 258 | 0 |
| 2001 | 298 | 132 |
| 2002 | 318 | 520 |
| 2003 | 322 | 713 |
| 2004 | 209 | 834 |
| 2005 | 206 | 779 |
| 2006 | 225 | 877 |
| 2007 | 194 | 827 |
| 2008 | 181 | 861 |
| 2009 | 188 | 818 |
| 2010 | 307 | 998 |
| 2011 | 332 | 1029 |
| 2012 | 400 | 959 |
| 2013 | 652 | 1226 |
| 2014 | 737 | 1441 |
| 2015 | 802 | 1513 |
| 2016 | 914 | 1559 |
| 2017 | 952 | 1496 |
| 2018 | 861 | 1378 |
| 2019 | 964 | 1509 |
| 2020 | 938 | 1527 |
| 2021 | 895 | 1651 |
| 2022 | 794 | 1553 |
| 2023 | 672 | 1522 |
| 2024 | 742 | 1483 |
| 2025 | 708 | 1278 |
| 2026 | 454 | 920 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- A61K 31/35Having six-membered rings with one oxygen as the only ring hetero atom6,231
- A61K 31/365Lactones4,709
- A61K 31/34Having five-membered rings with one oxygen as the only ring hetero atom3,093
- A61K 31/337Having four-membered rings3,010
- A61K 31/357Having two or more oxygen atoms in the same ring1,406
- A61K 31/336Having three-membered rings363
Recent patents
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- Nanostructure or microstructure and method for producing same6 Oct 2026US 12,751,923 B2The University of Tokyo
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- Therapeutic uses of inhibitors of the RNA-binding protein HuR6 Oct 2026US 12,751,938 B2University of Kansas
- Small molecule inhibitors of viral replication6 Oct 2026US 12,751,963 B2The Trustees of Princeton University
- Interface structure for a bioelectrode8 Oct 2026US 2026/0306000 A1Teknologian tutkimuskeskus VTT Oy
- Suspension containing heterocyclidene acetamide derivative8 Oct 2026US 2026/0306401 A1Mochida Pharmaceutical Co., Ltd.
- Triptolide formulations8 Oct 2026US 2026/0306412 A1Minneamrita Therapeutics LLC
- Nutritional compositions, supplements, and fortifiers8 Oct 2026US 2026/0306432 A1Societe des Produits Nestle S. A.
- Treprostinil prodrugs8 Oct 2026US 2026/0306438 A1United Therapeutics Corporation
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
- 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
- Anti-angiogenic compositions and methods of use968US 5,716,981 AAngiogenesis Technologies, Inc. · 1998