US3342633A
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
2026-10-25 11:29
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
THE METHOD OF FABRICATING A HIGH COERCIVITY MAGNETIC SURFACE HAVING CONTROLLED ANISOTROPY COMPRISING: HEATING A BODY OF FERROMAGNETIC METAL IN A VACUUM TO A TEMPERATURE SUFFICIENTLY TO VOLATILIZE THE SAID METAL; DIRECTING AND CONDENSING SAID VIOLATILIZED METAL ONTO A SUITABLE SUBSTRATE AT A SUBSTANTIALLY NORMAL ANGLE OF INCIDENCE TO FORM A FIRST FERROMAGNETIC LAYER; COOLING SAID CONDENSED METAL TO ROOM TEMPERATURE; VACUUM DEPOSITING A SECOND FERROMAGNETIC LAYER ONTO SAID FIRST LAYER BY HEATING A BODY OF FERROMAGNETIC METAL TO VOLATILIZE SAID METAL, AND DIRECTING AND CONDENSING SAID METAL ONTO SAID FIRST LAYER AT AN ANGLE OF INCIDENCE OF GREATER THAN ABOUT 45 DEGREES FROM THE NORMAL TO SAID SUBSTRATE; AND COOLING SAID DEPOSITED SECOND LAYER SUBSTANTIALLY TO ROOM TEMPERATURE IN A NON-OXIDIZING ATMOSPHERE.
Claim 2
Independent Claim
123 words
THE METHOD OF FABRICATING A HIGH COERCIVITY MAGNETIC SURFACE HAVING CONTROLLED ANISOTROPY COMPRISING: HEATING A BODY OF FERROMAGNETIC METAL IN A VACUUM TO A TEMPERATURE SUFFICIENTLY TO VOLATILIZE THE SAID METAL; DIRECTING AND CONDENSING SAID VIOLATILIZED METAL ONTO A SUITABLE SUBSTRATE AT A SUBSTANTIALLY NORMAL ANGLE OF INCIDENCE TO FORM A FIRST FERROMAGNETIC LAYER; COOLING SAID CONDENSED METAL TO ROOM TEMPERATURE; VACUUM DEPOSITING A SECOND FERROMAGNETIC LAYER ONTO SAID FIRST LAYER BY HEATING A BODY OF FERROMAGNETIC METAL TO VOLATILIZE SAID METAL, AND DIRECTING AND CONDENSING SAID METAL ONTO SAID FIRST LAYER AT AN ANGLE OF INCIDENCE OF GREATER THAN ABOUT 45 DEGREES FROM THE NORMAL TO SAID SUBSTRATE; AND COOLING SAID DEPOSITED SECOND LAYER SUBSTANTIALLY TO ROOM TEMPERATURE IN A NON-OXIDIZING ATMOSPHERE.
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 |