Patent US3348931A successfully refreshed from Google Patents.
US3348931A
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Memory element with a magnetically isotropic iron-nickel-copper alloy
Assignee: AT&T Inc
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Filing: 1964-12-14
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Granted: 1967-10-24
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Expires: 1984-12-14
Abstract
No abstract record available.
Inventors
- 👤 Jr John P Reekstin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:46
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/14; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9265; Y10S428/928; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/1234; Y10T428/1241; Y10T428/12417; Y10T428/12451; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12771; Y10T428/12861; Y10T428/12889; Y10T428/12903; Y10T428/12917; Y10T428/31504; Y10T428/31678; Y10T428/31714
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
A MAGNETIC OVERLAY FOR A CUBIC WAFFLE-IRON MEMORY ELEMENT COMPRISING A 40 MIL COPPER SUBSTRATE, A GOLD FILM APPROXIMATELY ONE MICRON IN THICKNESS COVERING SAID COPPER SUBSTRATE, AND A MAGNETIC FILM APPROXIMATELY 0.7 MICRON COVERING SAID GOLD FILM, SAID MAGNETIC FILM HAVING THE APPROXIMATE COMPOSITION: PERCENT FE 5 CU 11
References Cited (Backward Citations)
GB405643A
Cited
US2196824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |