H01B 3/52
Wood
Official title: wood; paper; press board
H01B3/52 (Wood) appears on 68 US grants and 73 published applications in this corpus.
Search patents in H01B- Granted patents
- 68
- Published applications
- 73
- Assignees
- 66
- Inventors
- 236
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 3 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 2 |
| 2013 | 0 | 6 |
| 2014 | 0 | 5 |
| 2015 | 2 | 8 |
| 2016 | 1 | 8 |
| 2017 | 3 | 4 |
| 2018 | 6 | 5 |
| 2019 | 3 | 4 |
| 2020 | 2 | 2 |
| 2021 | 4 | 6 |
| 2022 | 2 | 8 |
| 2023 | 5 | 2 |
| 2024 | 5 | 3 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electrical insulation paper12 May 2026US 12,626,836 B2Ahlstrom Oyj
- Reducing ageing of an insulation material of a winding, in particular of an oil-impregnated high-voltage device1 Apr 2025US 12,266,468 B2Siemens Energy Global GmbH & Co. KG
- Wire harness3 Sep 2024US 12,081,002 B2Sumitomo Wiring Systems, Ltd.
- Polyimide fiber paper using thermoplastic polymer2 Jul 2024US 12,024,824 B2Du Pont-Toray Co., Ltd.
- Joining structure of different kinds of conductors, joining method of different kinds of conductors, and joint of power cables18 Jun 2024US 12,014,843 B2Ls Cable & System Ltd.
- Device and method for pressboard manufacturing30 Apr 2026US 2026/0115963 A1Hitachi Energy Ltd
- Electrical insulation paper14 Aug 2025US 2025/0259764 A1Ahlstrom Oyj
- Impregnating coating layer for insulating sheetsand multilayer laminates24 Oct 2024US 2024/0351318 A1Coveme S.P.A.
- Impregnating coating layer for insulating sheets26 Sep 2024US 2024/0316879 A1Coveme S.P.A.
- Circuit board unwoven fabric, circuit board prepreg using same and circuit board using same18 Apr 2024US 2024/0125050 A1Dupont Safety & Construction, Inc.
Most cited
By later US patents
- Structural member of particulate material and method of making same89US 3,956,541 ACapital Wire & Cable, Division of U. S. Industries · 1976
- Laminated structural member and method of making same71US 4,097,648 ACapital Wire and Cable, Division of U.S. Industries · 1978
- Plastic-wood powder mixture for making insulating material for the electrical industry67US 4,168,251 ARehau Plastiks AG & Co. · 1979
- Process of making laminated structural member64US 4,016,232 ACapital Wire and Cable, Division of U.S. Industries · 1977
- Process of making a flexible structural member34US 4,016,233 ACapital Wire and Cable, Division of U.S. Industries · 1977