US3843420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sputtered granular ferromagnetic iron-nickel-silica films
Assignee: RCA Corp
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Filing: 1972-10-24
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Granted: 1974-10-22
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Expires: 1992-10-24
Abstract
Abstract 1. A SPUTTERED GRANULAR FERROMAGNETIC FILM CONSISTING ESSENTIALLY OF A COMPOSITION HAVING THE FORMULA (FEYNI1-Y)1-X''SIO2)X WHEREIN X IS FROM 0.001 TO 0.7 PART BY VOLUME AND Y IS FROM 0.001 TO 0.999 PART BY VOLUME, AND FURTHER CHARACTERIZED BY HAVING GRANULAR PARTICLE SIZE ON THE ORDER OF 10 TO 200 ANGSTROMS.
Inventors
- 👤 J Gittleman
- 👤 J Hanak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:23
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/34; C23C14/3407; C23C14/3414; C23C14/06; C23C14/08; H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A SPUTTERED GRANULAR FERROMAGNETIC FILM CONSISTING ESSENTIALLY OF A COMPOSITION HAVING THE FORMULA
Claim 2
Dependent Claim
13 words
A SPUTTERED GRANULAR FERROMAGNETIC FILM CONSISTING ESSENTIALLY OF A COMPOSITION HAVING THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |