Poly(meth)acrylate-based viscosity index improver, lubricant additive and lubricant composition containing viscosity index improver
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 10, 2017
Issued Date -
N/A
app pub date -
Jul 24, 2013
filing date -
Jul 24, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Loading Importance Indicators... 
Abstract
The present invention provides a poly(meth)acrylate-based viscosity index improver comprising a core portion and three or more arm portions, wherein each of the arm portions consists of a polymer chain comprising a structural unit represented by the following formula (1), and one end of the polymer chain is bonded to the core portion, and wherein a weight-average molecular weight Mw is 100000 or more, and a ratio of the weight-average molecular weight Mw to a number average molecular weight Mn, Mw/Mn, is 1.6 or less.
First Claim
Other Claims data not available
Family
Loading Family data...
International Classification(s)
- 2013 Application Filing Year
- C10N Class
- 5 Applications Filed
- 5 Patents Issued To-Date
- 100 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- C10N Class
- 0 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Apr 10, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 10, 2029 |
