B27K 3/343
Heterocyclic compounds
Official title: {Heterocyclic compounds}
B27K3/343 (Heterocyclic compounds) appears on 191 US grants and 173 published applications in this corpus.
Search patents in B27K- Granted patents
- 191
- Published applications
- 173
- Assignees
- 117
- Inventors
- 392
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 8 | 0 |
| 2000 | 4 | 0 |
| 2001 | 7 | 4 |
| 2002 | 8 | 9 |
| 2003 | 6 | 5 |
| 2004 | 5 | 6 |
| 2005 | 4 | 9 |
| 2006 | 1 | 10 |
| 2007 | 1 | 9 |
| 2008 | 1 | 10 |
| 2009 | 1 | 7 |
| 2010 | 8 | 6 |
| 2011 | 2 | 9 |
| 2012 | 5 | 1 |
| 2013 | 2 | 6 |
| 2014 | 10 | 10 |
| 2015 | 4 | 5 |
| 2016 | 3 | 10 |
| 2017 | 4 | 13 |
| 2018 | 5 | 4 |
| 2019 | 7 | 12 |
| 2020 | 2 | 3 |
| 2021 | 3 | 4 |
| 2022 | 2 | 3 |
| 2023 | 1 | 3 |
| 2024 | 5 | 6 |
| 2025 | 4 | 5 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wood treatment compositions having antimicrobial properties4 Aug 2026US 12,697,748 B2Société en Commandite Prolam
- Wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2H)-one, a method treating a wood substrate therewith, and a wood product produced therefrom26 May 2026US 12,636,810 B2Koppers Performance Chemicals Inc.
- Method for treating wood and construction element19 May 2026US 12,629,862 B2Houtindustrie “Mevo B.V.”
- Penflufen as a wood preservative against wood- destroying basidiomy cetes21 Apr 2026US 12,604,900 B2
- Wood preservatives24 Feb 2026US 12,557,809 B2
- Wood preservative and method for producing same11 Jun 2026US 2026/0157370 A1Koppers Performance Chemicals Inc.
- Method for modifying wood and products thereof28 May 2026US 2026/0145359 A1Rakauco Limited
- Wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2h)-one, a method treating a wood substrate therewith, and a wood product produced therefrom23 Apr 2026US 2026/0109076 A1Koppers Performance Chemicals Inc.
- Wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2h)-one, a method treating a wood substrate therewith, and a wood product produced therefrom12 Mar 2026US 2026/0070256 A1Koppers Performance Chemicals Inc.
- Wood preservative composition comprising 4,5-dichloro-2-octylisothiazol-3(2h)-one, a method treating a wood substrate therewith, and a wood product produced therefrom11 Dec 2025US 2025/0375917 A1Koppers Performance Chemicals Inc.
Most cited
By later US patents
- Wood preservative based on polymeric nitrogen compounds and metal-fixing acids91US 5,186,947 ADr. Wolman GmbH · 1993
- Anti-fouling compositions57US 5,990,043 ABayer Aktiengesellschaft · 1999
- Synergistic wood preservative compositions55US 5,462,589 AMississippi Forest Products Laboratory · 1995
- Inhibiting leaching of fire retardant salts from wood with cyclic sulfonium zwitterion solution impregnant45US 4,049,849 AThe Dow Chemical Company · 1977
- Synergistic compositions containing metconazole and another triazole43US 5,714,507 AJanssen Pharmaceutica NV · 1998