B27K 3/20
Compounds of alkali metals or ammonium
B27K3/20 (Compounds of alkali metals or ammonium) appears on 130 US grants and 113 published applications in this corpus.
Search patents in B27K- Granted patents
- 130
- Published applications
- 113
- Assignees
- 111
- Inventors
- 262
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 3 |
| 2002 | 0 | 5 |
| 2003 | 4 | 2 |
| 2004 | 1 | 2 |
| 2005 | 1 | 3 |
| 2006 | 0 | 3 |
| 2007 | 2 | 2 |
| 2008 | 1 | 3 |
| 2009 | 2 | 2 |
| 2010 | 2 | 1 |
| 2011 | 1 | 1 |
| 2012 | 1 | 2 |
| 2013 | 0 | 3 |
| 2014 | 4 | 2 |
| 2015 | 2 | 0 |
| 2016 | 1 | 1 |
| 2017 | 2 | 6 |
| 2018 | 2 | 6 |
| 2019 | 6 | 11 |
| 2020 | 2 | 11 |
| 2021 | 8 | 10 |
| 2022 | 3 | 6 |
| 2023 | 4 | 7 |
| 2024 | 7 | 12 |
| 2025 | 8 | 3 |
| 2026 | 1 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for treating wood and construction element19 May 2026US 12,629,862 B2Houtindustrie “Mevo B.V.”
- Wood composites and processes to modify same using stable, low pH aqueous silicate suspensions30 Dec 2025US 12,508,737 B2T2Earth Holdings LLC
- Green process for modifying wood2 Dec 2025US 12,485,570 B2T2Earth Holdings LLC
- Method for the modification of wood materials to improve mechanical properties, water resistance and flame retardancy by utilizing a combination of mineralization with infusion and polymerization of biopolymers18 Nov 2025US 12,472,658 B1Hema High-Tech Eco Materials Joint Stock Company
- Board material processing composition, board material laminate, and method for manufacturing board material laminate4 Nov 2025US 12,460,091 B2M&HTechnical Research Institute Co., LTD.
- Transparent wood composite, method for preparing the same, and optical film comprising the same9 Jul 2026US 2026/0192486 A1Hyundai Motor Company
- 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
- Process and Design Modifications to Retrofit a Conventional Wood Plant14 May 2026US 2026/0131498 A1T2Earth Holdings LLC
- Environmentally-clean fire inhibiting biochemical compositions, solutions and powders, and methods of and apparatus for producing fire protected wood products12 Mar 2026US 2026/0069911 A1Mighty Fire Breaker LLC
Most cited
By later US patents
- Molten salt method of producing fire resistant wood articles52US 3,935,343 AUnited States Gypsum Company · 1976
- Preservative composition for wood52US 4,622,248 AOsmose Wood Preserving Co. of America, Inc. · 1986
- Flame retardant and microbe inhibiting methods and compositions48US 7,767,010 B2SMT, Inc. · 2010
- Combination fire retardant, anti-soiling and biocidal agent46US 5,631,047 AAmerican Fire Retardant Corp. · 1997
- Inhibiting leaching of fire retardant salts from wood with cyclic sulfonium zwitterion solution impregnant45US 4,049,849 AThe Dow Chemical Company · 1977