US3735052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head assembly using titanium dioxide and barium titanate slider
Assignee: International Business Machines Corp
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Filing: 1971-07-16
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Granted: 1973-05-22
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Expires: 1991-07-16
Abstract
Abstract A magnetic head assembly includes a glass-gapped ferrite head bonded into a ceramic slider with a glass. The slider is made of a ceramic composition consisting essentially of the reaction product of 70 to 85 percent, by weight, titanium dioxide (TiO2) and 30-15 percent barium titanate (BaTiO3). Infrared bonding is employed. Copper may be introduced into the ceramic composition to enhance its infrared absorption properties.
Inventors
- 👤 H Hoogendoorn
- 👤 C Mcintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:24
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/1272; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; C04B35/4686; G11B5/10; G11B5/105; G11B5/133; G11B5/187; G11B5/23; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49036; Y10T29/49041; Y10T29/49048
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
21 words
A ferrite head assembly as in claim 1 additionally comprising: an additive adapted to render the ceramic slider material infrared absorBent.
References Cited (Backward Citations)
US2626220A
Cited
US3562444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |