Paper filler composition
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 5, 2022
Grant Date -
Dec 27, 2018
app pub date -
Aug 30, 2018
filing date -
May 15, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 450 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium consisting essentially of mullite. The grinding may be carried out in the absence of grindable inorganic particulate material. The grinding medium may be present in an amount of at least about 10% by volume of the aqueous environment. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2018 Application Filing Year
- D21B Class
- 59 Applications Filed
- 33 Patents Issued To-Date
- 55.94 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- D21B Class
- 78.26 % this patent is cited more than
- 3 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 | Jan 5, 2026 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jan 5, 2030 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 5, 2034 |
