B27K
Processes, apparatus or selection of substances for impregnating, staining, dyeing, bleaching of
Official title: PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR (applying liquids or other fluent materials to surfaces in general B05; coating wood or similar material B44D); CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
B27K (Processes, apparatus or selection of substances for impregnating, staining, dyeing, bleaching of) appears on 1,481 US grants and 1,367 published applications in this corpus.
Search patents in B27K- Granted patents
- 1,481
- Published applications
- 1,367
- Assignees
- 931
- Inventors
- 2,916
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 37 | 0 |
| 1977 | 35 | 0 |
| 1978 | 17 | 0 |
| 1979 | 18 | 0 |
| 1980 | 17 | 0 |
| 1981 | 31 | 0 |
| 1982 | 18 | 0 |
| 1983 | 29 | 0 |
| 1984 | 14 | 0 |
| 1985 | 14 | 0 |
| 1986 | 25 | 0 |
| 1987 | 25 | 0 |
| 1988 | 31 | 0 |
| 1989 | 33 | 0 |
| 1990 | 26 | 0 |
| 1991 | 28 | 0 |
| 1992 | 31 | 0 |
| 1993 | 24 | 0 |
| 1994 | 26 | 0 |
| 1995 | 26 | 0 |
| 1996 | 27 | 0 |
| 1997 | 31 | 0 |
| 1998 | 20 | 0 |
| 1999 | 30 | 0 |
| 2000 | 29 | 0 |
| 2001 | 35 | 18 |
| 2002 | 35 | 35 |
| 2003 | 47 | 39 |
| 2004 | 23 | 47 |
| 2005 | 17 | 54 |
| 2006 | 13 | 67 |
| 2007 | 20 | 55 |
| 2008 | 16 | 51 |
| 2009 | 17 | 55 |
| 2010 | 35 | 44 |
| 2011 | 17 | 48 |
| 2012 | 24 | 46 |
| 2013 | 38 | 59 |
| 2014 | 37 | 57 |
| 2015 | 32 | 50 |
| 2016 | 42 | 55 |
| 2017 | 27 | 82 |
| 2018 | 36 | 48 |
| 2019 | 57 | 70 |
| 2020 | 41 | 62 |
| 2021 | 44 | 70 |
| 2022 | 38 | 59 |
| 2023 | 32 | 53 |
| 2024 | 46 | 73 |
| 2025 | 44 | 37 |
| 2026 | 26 | 33 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- B27K 3/00Impregnating wood1,316
- B27K 5/00Treating of wood not provided for in groups b27k1/00, b27k3/00492
- B27K 2240/00Purpose of the treatmentIndexing code380
- B27K 2200/00Wooden materials to be treatedIndexing code89
- B27K 1/00Damping wood64
- B27K 9/00Chemical or physical treatment of reed, straw, or similar material27
- B27K 7/00Chemical or physical treatment of cork21
Recent patents
- Method for producing a wooden composite board, and device for producing a wooden composite board15 Sep 2026US 12,734,723 B2SWISS KRONO Tec AG
- Densified hygroscopic materials and products made thereof8 Sep 2026US 12,728,560 B2Swiss Wood Solutions AG
- Wood treatment compositions having antimicrobial properties4 Aug 2026US 12,697,748 B2Société en Commandite Prolam
- Treating cellulosic materials and methods of making treated cellulosic materials7 Jul 2026US 12,673,443 B2Georgia Tech Research Corporation
- Transparent wood surface imprinting optical device and application thereof30 Jun 2026US 12,667,994 B2Nanjing Forestry University
- Polymer dispersion for coating wood for blocking migratable compounds8 Oct 2026US 2026/0308286 A1Arkema France
- Hemp wood preservative compositions and related methods24 Sep 2026US 2026/0284926 A1SporoBio, LLC
- Apparatus and method for heat treatment of wood24 Sep 2026US 2026/0286227 A1
- Process for the acetylation of wood and acetylated wood17 Sep 2026US 2026/0273793 A1Titan Wood Limited
- Process for partial delignification and filling of a lignocellulosic material, and composite material structure able to be obtained by this process27 Aug 2026US 2026/0249512 A1SAS Woodoo
Most cited
By later US patents
- Fire retardant compositions and methods for preserving wood products255US 6,620,349 B12003
- Water repellent composition148US 5,695,551 ADow Corning Corporation · 1997
- Plug for sealing preservative in wood142US 5,114,032 A1992
- Golf club head97US 4,568,088 ASumitomo Rubber Industries, Ltd. · 1986
- Wood preservative based on polymeric nitrogen compounds and metal-fixing acids91US 5,186,947 ADr. Wolman GmbH · 1993