Strong and tough structural wood materials, and methods for fabricating and use thereof
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 28, 2021
Grant Date -
Jul 16, 2020
app pub date -
Apr 9, 2018
filing date -
Apr 10, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A super strong and tough densified wood structure is formed by subjecting a cellulose-based natural wood material to a chemical treatment that partially removes lignin therefrom. The treated wood retains lumina of the natural wood, with cellulose nanofibers of cell walls being aligned. The treated wood is then pressed in a direction crossing the direction in which the lumina extend, such that the lumina collapse and any residual fluid within the wood is removed. As a result, the cell walls become entangled and hydrogen bonds are formed between adjacent cellulose nanofibers, thereby improving the strength and toughness of the wood among other mechanical properties. By further modifying, manipulating, or machining the densified wood, it can be adapted to various applications.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2018 Application Filing Year
- B27K Class
- 69 Applications Filed
- 44 Patents Issued To-Date
- 63.77 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- B27K Class
- 66.67 % this patent is cited more than
- 4 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Mar 28, 2025 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Mar 28, 2029 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 28, 2033 |
