US3420756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a ferromagnetic thin film
Assignee: NTT Inc
•
Filing: 1964-09-15
•
Granted: 1969-01-07
•
Expires: 1984-09-15
Abstract
No abstract record available.
Inventors
- 👤 Makoto Terajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:30
CPC Classifications
C; C23; C23C; C23C28/00; C23C28/02; C23C28/027; C23C14/00; C23C14/02; C23C14/024; C23C28/021; C23C28/026; H; H01; H01F; H01F10/00; H01F10/06; H01F10/26; H01F10/30; Y; Y10; Y10S; Y10S205/00; Y10S205/922; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12597; Y10T428/12611
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3274024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |