US3342632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic coating
Assignee: International Business Machines Corp
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Filing: 1964-08-05
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Granted: 1967-09-19
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Expires: 1984-08-05
Abstract
No abstract record available.
Inventors
- 👤 Bate Geoffrey
- 👤 Dennis E Speliotis
- 👤 John R Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:05
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; H; H01; H01F; H01F41/00; H01F41/14; H01F41/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF FABRICATING A HIGH COERCIVITY MAGNETIC RECORDING MEMBER COMPRISING: HEATING A BODY OF FERROMAGNETIC METAL IN A VACUUM TO A TEMPERATURE SUFFICIENTLY HIGH TO VOLATILIZE THE SAID METAL; DIRECTING AND CONDENSING SAID VOLATILLIZED METAL ONTO A SUITABLE SUBSTRATE AT AN ANGLE OF INCIDENCE OF GREATER THAN ABOUT 45 DEGREES FROM THE NORMAL TO THE SAID SUBSTRATE TO FORM A CONDENSED FERROMAGNETIC METAL LAYER; AND COOLING SAID CONDENSED METAL TO ROOM TEMPERATURE.
Claim 2
Independent Claim
73 words
THE METHOD OF FABRICATING A HIGH COERCIVITY MAGNETIC RECORDING MEMBER COMPRISING: HEATING A BODY OF FERROMAGNETIC METAL IN A VACUUM TO A TEMPERATURE SUFFICIENTLY HIGH TO VOLATILIZE THE SAID METAL; DIRECTING AND CONDENSING SAID VOLATILLIZED METAL ONTO A SUITABLE SUBSTRATE AT AN ANGLE OF INCIDENCE OF GREATER THAN ABOUT 45 DEGREES FROM THE NORMAL TO THE SAID SUBSTRATE TO FORM A CONDENSED FERROMAGNETIC METAL LAYER; AND COOLING SAID CONDENSED METAL TO ROOM TEMPERATURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |