Core-shell particles, and method for separating and purifying substance to be separated using core-shell particles
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United States of America Patent
Stats
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Feb 27, 2024
Grant Date -
Aug 12, 2021
app pub date -
Jun 7, 2019
filing date -
Jun 14, 2018
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention aims to provide core-shell particles that can be used in a method of separating a substance to be separated and that allow obtainment of a highly purified product. Each of a plurality of core-shell particles (C) of the present invention includes a core layer (P) as magnetic silica particles containing the magnetic metal oxide particles (A) and a shell layer (Q) that is a silica layer on a surface of the core layer (P), an average thickness of a plurality of shell layers (Q) being 3 to 3000 nm, wherein a weight percentage of the magnetic metal oxide particles (A) in the core layer (P) is 60 to 95 wt % based on a weight of the core layer (P), and the plurality of core-shell particles (C) have a particle size distribution with a coefficient of variation of 50% or less.
First Claim
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International Classification(s)
- 2019 Application Filing Year
- B03C Class
- 257 Applications Filed
- 147 Patents Issued To-Date
- 57.20 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- B03C Class
- 0 % this patent is cited more than
- 1 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 | Aug 27, 2027 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Aug 27, 2031 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 27, 2035 |
