B27K 5/04
Combined bleaching or impregnating and drying of wood
B27K5/04 (Combined bleaching or impregnating and drying of wood) appears on 73 US grants and 52 published applications in this corpus.
Search patents in B27K- Granted patents
- 73
- Published applications
- 52
- Assignees
- 62
- Inventors
- 168
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 0 | 2 |
| 2004 | 1 | 2 |
| 2005 | 2 | 4 |
| 2006 | 1 | 1 |
| 2007 | 1 | 4 |
| 2008 | 0 | 1 |
| 2009 | 0 | 3 |
| 2010 | 1 | 3 |
| 2011 | 0 | 1 |
| 2012 | 0 | 4 |
| 2013 | 3 | 2 |
| 2014 | 0 | 1 |
| 2015 | 2 | 1 |
| 2016 | 0 | 2 |
| 2017 | 0 | 1 |
| 2018 | 1 | 2 |
| 2019 | 1 | 0 |
| 2020 | 1 | 2 |
| 2021 | 2 | 1 |
| 2022 | 1 | 2 |
| 2023 | 1 | 4 |
| 2024 | 1 | 2 |
| 2025 | 2 | 2 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Green process for modifying wood2 Dec 2025US 12,485,570 B2T2Earth Holdings LLC
- Strong and tough structural wood materials, and methods for fabricating and use thereof29 Apr 2025US 12,285,882 B2University of Maryland, College Park
- Rotary separation apparatus and process of use3 Sep 2024US 12,076,465 B2The Original Resinator LLC
- Strong and tough structural wood materials, and methods for fabricating and use thereof17 Jan 2023US 11,554,514 B2University of Maryland, College Park
- Selectively depolymerizing cellulosic materials for use as thermal and acoustic insulators29 Nov 2022US 11,512,427 B2DTE Materials Incorporated
- Process To Make Silicate Functionalized Engineered Wood Articles With Improved Properties9 Jul 2026US 2026/0192485 A1T2Earth Holdings LLC
- Method for modifying wood and products thereof28 May 2026US 2026/0145359 A1Rakauco Limited
- Method for producing modified wood material, and modified wood material14 May 2026US 2026/0131497 A1Keihoku Precut Co., Ltd.
- Rotary Separation Apparatus and Process of Use11 Sep 2025US 2025/0281660 A1The Original Resinator LLC
- Strong and tough structural wood materials, and methods for fabricating and use thereof22 May 2025US 2025/0162189 A1University of Maryland, College Park
Most cited
By later US patents
- Fire retarding composition and a method for impregnation of a combustible material58US 6,042,639 AFireguard Scandinavia AS · 2000
- Molten salt method of producing fire resistant wood articles52US 3,935,343 AUnited States Gypsum Company · 1976
- Phosphate bonded composites and methods50US 8,603,231 B2Latitude 18, Inc. · 2013
- Heavy duty aqueous wood preservative29US 3,945,835 ACanadian Patents and Development Limited · 1976
- Treatment of wood28US 4,062,991 AFosroc A.G. · 1977