US3148079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing thin film ferrimagnetic oxides
Assignee: New York University
•
Filing: 1961-10-12
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Granted: 1964-09-08
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Expires: 1981-10-12
Abstract
No abstract record available.
Inventors
- 👤 Banks Ephraim
- 👤 Norman H Riederman
- 👤 Hubert W Schleuning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:36
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/08; C23C14/085; C23C14/14; C23C14/18; C23C14/58; C23C14/5806; C23C14/5846; C23C14/5853; H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/18; H01F10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
PROCESS FOR THE PRODUCTION OF A MAGNETITE CUBIC SPINEL FERRIMAGNETIC THIN FILM OF THE APPROXIMATE FORMULA FEIIFE2IIIO4 COMPRISING THE VACUUM DEPOSITION OF PURE IRON ON A SUITABLE SUBSTRATE MATERIAL AT A PRESSURE OF LESS THAN 10**4MM. HG AND A TEMPERATURE OF APPROXIMATELY 1000*C., THEREAFTER SUBJECTING THE PURE IRON FILM DEPOSITIED ON SAID SUBSTRATE TO AN OXIDIZING ATMOSPHERE AT A TEMPERATURE OF APPROXIMATELY 1000*C., EFFECTING THEREBY THE CONTROLLED OXIDATIN OF SAID FILM TO SAID MAGNETITE FERRIMAGNETIC OXIDE FILM AS AFORESAID, AND QUENCHING SAID MAGNETIC FILM IN OIL AT APPROXIMATELY 0*C. IMMEDIATELY THEREAFTER.
Claim 2
Dependent Claim
91 words
PROCESS FOR THE PRODUCTION OF A MAGNETITE CUBIC SPINEL FERRIMAGNETIC THIN FILM OF THE APPROXIMATE FORMULA FEIIFE2IIIO4 COMPRISING THE VACUUM DEPOSITION OF PURE IRON ON A SUITABLE SUBSTRATE MATERIAL AT A PRESSURE OF LESS THAN 10**4MM. HG AND A TEMPERATURE OF APPROXIMATELY 1000*C., THEREAFTER SUBJECTING THE PURE IRON FILM DEPOSITIED ON SAID SUBSTRATE TO AN OXIDIZING ATMOSPHERE AT A TEMPERATURE OF APPROXIMATELY 1000*C., EFFECTING THEREBY THE CONTROLLED OXIDATIN OF SAID FILM TO SAID MAGNETITE FERRIMAGNETIC OXIDE FILM AS AFORESAID, AND QUENCHING SAID MAGNETIC FILM IN OIL AT APPROXIMATELY 0*C. IMMEDIATELY THEREAFTER.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |