B27K 3/22
Compounds of zinc or copper
B27K3/22 (Compounds of zinc or copper) appears on 180 US grants and 183 published applications in this corpus.
Search patents in B27K- Granted patents
- 180
- Published applications
- 183
- Assignees
- 117
- Inventors
- 332
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 12 | 0 |
| 1989 | 10 | 0 |
| 1990 | 6 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 2 |
| 2002 | 4 | 1 |
| 2003 | 4 | 5 |
| 2004 | 2 | 6 |
| 2005 | 1 | 12 |
| 2006 | 1 | 12 |
| 2007 | 3 | 11 |
| 2008 | 5 | 11 |
| 2009 | 6 | 13 |
| 2010 | 3 | 3 |
| 2011 | 2 | 5 |
| 2012 | 2 | 2 |
| 2013 | 5 | 7 |
| 2014 | 9 | 11 |
| 2015 | 3 | 5 |
| 2016 | 5 | 8 |
| 2017 | 6 | 13 |
| 2018 | 5 | 4 |
| 2019 | 4 | 13 |
| 2020 | 1 | 6 |
| 2021 | 4 | 7 |
| 2022 | 4 | 3 |
| 2023 | 2 | 6 |
| 2024 | 4 | 9 |
| 2025 | 3 | 5 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Treating cellulosic materials and methods of making treated cellulosic materials7 Jul 2026US 12,673,443 B2Georgia Tech Research Corporation
- Penflufen as a wood preservative against wood- destroying basidiomy cetes21 Apr 2026US 12,604,900 B2
- Purgeable injection apparatus for spill-free replenishment of embedded foundation preservation wraps8 Jul 2025US 12,350,707 B2Copper Care Wood Preservatives, Inc.
- Wood preservative and method for producing same22 Apr 2025US 12,279,615 B2Koppers Performance Chemicals Inc.
- Preservative composition for wood based on modified lignin11 Feb 2025US 12,219,957 B2Universidad Del Pais Vasco/Euskal Herriko Unibertsitatea
- Antimicrobial materials, and systems and methods for fabrication and use thereof16 Jul 2026US 2026/0198500 A1University of Maryland, College Park
- Wood preservative and method for producing same11 Jun 2026US 2026/0157370 A1Koppers Performance Chemicals Inc.
- 1,3-propanediol carrier compositions and methods of use thereof4 Jun 2026US 2026/0151930 A1Primient Covation LLC
- Purgeable injection apparatus for spill-free replenishment of embedded foundation preservation wraps2 Oct 2025US 2025/0303438 A1Copper Care Wood Preservatives, Inc.
- In-Process Drying for Oil Based Timber Treatment3 Jul 2025US 2025/0214276 A1Arxada AG
Most cited
By later US patents
- Wood preservative based on polymeric nitrogen compounds and metal-fixing acids91US 5,186,947 ADr. Wolman GmbH · 1993
- Synergistic wood preservative compositions55US 5,462,589 AMississippi Forest Products Laboratory · 1995
- Wood treatment composition49US 4,929,454 ADomtar Inc. · 1990
- Closable bag and method and arrangement for aseptic filling thereof48US 4,731,978 AAlfa-Laval Food & Dairy Engineering AB · 1988
- Synergistic compositions containing metconazole and another triazole43US 5,714,507 AJanssen Pharmaceutica NV · 1998