GLASS FOR MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM, GLASS SPACER FOR MAGNETIC RECORDING/REPRODUCING DEVICE, AND MAGNETIC RECORDING/REPRODUCING DEVICE
LaoBiz.com profiles the Laos Patent “GLASS FOR MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM, GLASS SPACER FOR MAGNETIC RECORDING/REPRODUCING DEVICE, AND MAGNETIC RECORDING/REPRODUCING DEVICE” from open registry fields, filed by HOYA CORPORATION on 2019-05-14; current status: Awaiting formal examination. Identifiers include application No. P/742; DIP id LAP742; protection kind Patent - PCT National Phase. Key dates: publication 2026-02-27. Classification: C03C 3/078、C03C 3/083、C03C 3/085、C03C 3/087、C03C 3/089、C03C 3/091、C03C 3/093、G11B 5/73. Inventor(s)/designer(s): HASHIMOTO, Kazuaki, SATO Koichi. Abstract hint: Provided is a glass for a magnetic recording medium substrate, the glass being an amorphous oxide glass having an SiO 2 content of 56-80 mo…. Unique application identifiers, holders and classification text are surfaced here to reduce near-duplicate IP landing pages; always verify against the competent office.
P/742
Mark
Key facts
- Type
- Patent
- App. no.
P/742- Status
- Awaiting formal examination
- Applicant
- HOYA CORPORATION
- Agent
- Tilleke & Gibbins Lao Co., Ltd
- Filing date
- 2019-05-14
- Publication
- 2026-02-27
- Protection kind
- Patent - PCT National Phase
- Priority
- JP · 2018-094428 · 2018-05-16
- Nice / IPC classes
- C03C 3/078 · C03C 3/083 · C03C 3/085 · C03C 3/087 · C03C 3/089 · C03C 3/091 · C03C 3/093 · G11B 5/73
- Goods / services
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Process
Steps follow the current public status-
Filed
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Formal examination In progress
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Substantive examination
-
Published
-
Granted
Related records
Linked from the LaoBiz.com company databaseSimilar Patent
Abstract
Provided is a glass for a magnetic recording medium substrate, the glass being an amorphous oxide glass having an SiO 2 content of 56-80 mol%, an Li 2 O content of 1-10 mol%, a B 2 O 3 content of 0-4 mol%, a total content (MgO + CaO) of MgO and CaO of 9-40 mol%, a specific gravity of 2.75 g/cm 3 or lower, a glass transition temperature of 650°C or higher, and a Young's modulus of 90 GPa or higher.
Provided is a glass for a magnetic recording medium substrate, the glass being an amorphous oxide glass having an SiO 2 content of 56-80 mol%, an Li 2 O content of 1-10 mol%, a B 2 O 3 content of 0-4 mol%, a total content (MgO + CaO) of MgO and CaO of 9-40 mol%, a specific gravity of 2.75 g/cm 3 or lower, a glass transition temperature of 650°C or higher, and a Young's modulus of 90 GPa or higher.
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