Glass Spacer and Hard Disc Drive Device
LaoBiz.com profiles the Laos Patent “Glass Spacer and Hard Disc Drive Device” from open registry fields, filed by HOYA CORPORATION on 2018-10-01; current status: Registered. Identifiers include application No. P/697; DIP id LAP697; protection kind Patent - PCT National Phase. Key dates: publication 2023-06-09; grant 2023-06-09; expiry reference 2038-10-01. Classification: G11B 17/038、G11B 23/00、G11B 25/04、G11B 5/65. Inventor(s)/designer(s): Masao TAKANO, Shinji EDA. Abstract hint: The purpose of the present invention is to prevent adhesion between a magnetic disc and a spacer when removing the magnetic disc and the sp…. Use LaoBiz.com to hop between this IP record, related filings by the same applicant, and the matched company profile when present.
P/697
Mark
Key facts
- Type
- Patent
- App. no.
P/697- Status
- Registered
- Applicant
- HOYA CORPORATION
- Agent
- Tilleke & Gibbins Lao Co.,Ltd
- Filing date
- 2018-10-01
- Reg. no.
P/697- Publication
- 2023-06-09
- Registration / grant
- 2023-06-09
- Expiry
- 2038-10-01
- Protection kind
- Patent - PCT National Phase
- Gazette
- 210 · 2023-06-09
- Priority
- JP · 2017-191256 · 2017-09-29
- Applicant address
- HOYA CORPORATION · 6-10-1Nishi-Shinjuku, Shinjuku-ku, Tokyo 1608347, Japan · JP
- Agent address
- Tilleke & Gibbins Lao Co.,Ltd · Road, Village, District, Vientiane Capital Lao PDR · LA
- Nice / IPC classes
- G11B 17/038 · G11B 23/00 · G11B 25/04 · G11B 5/65
- Goods / services
- —
Process
Steps follow the current public status-
Filed
-
Formal examination
-
Substantive examination
-
Published
-
Granted
Related records
Linked from the LaoBiz.com company databaseSimilar Patent
Abstract
The purpose of the present invention is to prevent adhesion between a magnetic disc and a spacer when removing the magnetic disc and the spacer from a hard disc drive device where the magnetic disc and the spacer are installed. The surface roughness Ra on the principal surface of the ring-shaped glass spacer in contact with the magnetic disc in the hard disc drive device is set to 1.0 µm or less and the average inclination R∆a of the principal surface is set to 0.02 or greater.
The purpose of the present invention is to prevent adhesion between a magnetic disc and a spacer when removing the magnetic disc and the spacer from a hard disc drive device where the magnetic disc and the spacer are installed. The surface roughness Ra on the principal surface of the ring-shaped glass spacer in contact with the magnetic disc in the hard disc drive device is set to 1.0 µm or less and the average inclination R∆a of the principal surface is set to 0.02 or greater.
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