Patent US3970597A successfully refreshed from Google Patents.
US3102048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic films
Assignee: Honeywell Inc
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Filing: 1960-11-14
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Granted: 1963-08-27
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Expires: 1980-11-14
Abstract
No abstract record available.
Inventors
- 👤 Burton E Gran
- 👤 James O Holmen
- 👤 Richard J Prosen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:47
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/14; H01F41/20; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12597; Y10T428/12729; Y10T428/12736; Y10T428/26; Y10T428/261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A METHOD FOR PRODUCING A THIN MAGNETIC FILM POSSESSING THE PROPERTY OF ROTATABLE ANISOTROPY, SAID METHOD COMPRISING THROUGHLY OUTGASSING A NON MAGNETIC SUBSTRATE, PRODUCING AN ABSORBEED LAYER OF OXYGEN ON SAID SUBSTRATE, MAINTAINING SAID SUBSTRATE AT A TEMPERATURE BELOW 350*C. AND IN A VACUUM OF ABOUT 10-5 MM. OF MECURY PRESSURE, EVAPORATING A NICKEL-IRON ALLOY HAVING A COMPOSITION SUCH ZTHAT A DEPOSIT WILL BE PRODUCED CONSISTING OF FROM ABOUT 77% UP TO ABOUT 83% NICKEL, BALANCE IRON ONTO SAID SUBSTRATE TO FORM A FILM GREATER THAN 2700 A. THICKNESS, SAID FILM BEING PREDOMINENTLY METAL AND HAVING ON THE SURFACE THEREOF AN OXIDE LAYER.
Claim 2
Independent Claim
103 words
A METHOD FOR PRODUCING A THIN MAGNETIC FILM POSSESSING THE PROPERTY OF ROTATABLE ANISOTROPY, SAID METHOD COMPRISING THROUGHLY OUTGASSING A NON MAGNETIC SUBSTRATE, PRODUCING AN ABSORBEED LAYER OF OXYGEN ON SAID SUBSTRATE, MAINTAINING SAID SUBSTRATE AT A TEMPERATURE BELOW 350*C. AND IN A VACUUM OF ABOUT 10-5 MM. OF MECURY PRESSURE, EVAPORATING A NICKEL-IRON ALLOY HAVING A COMPOSITION SUCH ZTHAT A DEPOSIT WILL BE PRODUCED CONSISTING OF FROM ABOUT 77% UP TO ABOUT 83% NICKEL, BALANCE IRON ONTO SAID SUBSTRATE TO FORM A FILM GREATER THAN 2700 A. THICKNESS, SAID FILM BEING PREDOMINENTLY METAL AND HAVING ON THE SURFACE THEREOF AN OXIDE LAYER.
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) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |