Rare-earth regenerator material particles, and group of rare-earth regenerator material particles, refrigerator and measuring apparatus using the same, and method for manufacturing the same
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United States of America Patent
Stats
-
Aug 1, 2017
Issued Date -
N/A
app pub date -
Jun 29, 2016
filing date -
Aug 25, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided is a group of rare-earth regenerator material particles having an average particle size of 0.01 to 3 mm, wherein the proportion of particles having a ratio of a long diameter to a short diameter of 2 or less is 90% or more by number, and the proportion of particles having a depressed portion having a length of 1/10 to ½ of a circumferential length on a particle surface is 30% or more by number. By forming the depressed portion on the surface of the regenerator material particles, it is possible to increase permeability of an operating medium gas and a contact surface area with the operating medium gas.
First Claim
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International Classification(s)
- 2016 Application Filing Year
- C09K Class
- 3076 Applications Filed
- 2094 Patents Issued To-Date
- 68.08 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- C09K 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 | Feb 1, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 1, 2029 |
