Tungsten-based sintered material having high strength and high hardness, and hot press mold used for optical glass lenses

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United States of America Patent

PATENT NO 7615094
APP PUB NO 20070169586A1
SERIAL NO

10598585

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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having the largest particle diameter of 5 μm or less are distributed at boundaries of the W phases; and the largest particle diameter of the W phase is 30 μm or less. The first tungsten-based sintered material is preferably used for a hot press mold for optical glass lenses.

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI MATERIALS C M I CORPORATION46-1 SEMPUKU SUSONO-SHI SHIZUOKA-KEN

International Classification(s)

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  • 2004 Application Filing Year
  • B22F Class
  • 222 Applications Filed
  • 116 Patents Issued To-Date
  • 52.26 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances2004200520062007200820092010201120122013201420150255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Otsuki, Masato Susono , JP 5 83
Yang, Ji-bin Susono , JP 16 108

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