B27K 3/44
Tar
Official title: Tar; Mineral oil
B27K3/44 (Tar) appears on 40 US grants and 24 published applications in this corpus.
Search patents in B27K- Granted patents
- 40
- Published applications
- 24
- Assignees
- 37
- Inventors
- 78
- Latest grant
- 29 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 4 | 0 |
| 2003 | 2 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 3 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 1 | 2 |
| 2017 | 4 | 4 |
| 2018 | 1 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 1 |
| 2021 | 2 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 2 |
| 2024 | 0 | 0 |
| 2025 | 1 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Strong and tough structural wood materials, and methods for fabricating and use thereof29 Apr 2025US 12,285,882 B2University of Maryland, College Park
- Strong and tough structural wood materials, and methods for fabricating and use thereof17 Jan 2023US 11,554,514 B2University of Maryland, College Park
- Strong and tough structural wood materials, and methods for fabricating and use thereof28 Sep 2021US 11,130,256 B2University of Maryland, College Park
- Method and formulation for the treatment of timber19 Jan 2021US 10,894,337 B2Arch Wood Protection Pty Ltd
- Outdoor bamboo floor7 Jan 2020US 10,526,795 B2Zhejiang Yongyu Bamboo Joint-Stock Co., Ltd.
- Apparatus for preserving wood structures12 Mar 2026US 2026/0070254 A1
- Water and Quality Management of Oil-Based Wood Preservatives3 Jul 2025US 2025/0214277 A1Arxada AG
- Strong and tough structural wood materials, and methods for fabricating and use thereof22 May 2025US 2025/0162189 A1University of Maryland, College Park
- Microemulsions and their uses27 Jul 2023US 2023/0235242 A1Cfliquids AB
- Strong and tough structural wood materials, and methods for fabricating and use thereof1 Jun 2023US 2023/0166427 A1University of Maryland, College Park
Most cited
By later US patents
- Bio-oil preservatives48US 6,485,841 B1Ensyn Technologies, Inc. · 2002
- Preservative composition36US 5,098,472 ACommonwealth Scientific and Industrial Research Organization · 1992
- Arsenical creosote wood preservatives25US 4,656,060 A1987
- Process for impregnating cellulosic materials and products hereby obtained24US 4,386,134 A1983
- Wood treatment composition and method of use22US 6,953,501 B2Inventions & Discoveries, LLC · 2005