US3350180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic device with alternating lami- na of magnetic material and non-mag- netic metal on a substrate
Assignee: —
•
Filing: —
•
Granted: 1967-10-31
•
Expires: 1984-10-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:21
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70605; Y; Y10; Y10S; Y10S205/00; Y10S205/922; Y10S428/00; Y10S428/90; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9265; Y10S428/928; Y10S428/9335; Y10S428/934; Y10S428/935; Y10S428/936; Y10S428/937; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12632; Y10T428/12771; Y10T428/12861; Y10T428/12889
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A LAMINATED MAGNETIC FILM DEVICE HAVING A TOTAL MAGNETIC FILM THICKNESS OF FROM 10,000 A. TO 40,000 A., SAID DEVICE HAVING A COERCIVITY GREATER THAN THE COERCIVITY OF AN UNLAMINATED MAGNETIC FILM DEVICE OF EQUAL THICKNESS COMPRISING A PLURALITY OF DISCRETE LAMINAE OF A MAGNETIC MATERIAL HAVING UNIFORM THICKNESS, SAID MAGNETIC MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF FE-NI ALLOY, FE-NI-CO ALLOY, AND FE-NI-P ALLOY; AND A SERIES OF DISCRETE MONMAGNETIC CONDUCTING METAL LAMINAE SELECTED FROM THE GROUP CONSISTING OF AU, AG, CU, SN, RH, PD AND PT, ALTERNATELY DISPOSED BETWEEN SAID MAGNETIC LAMINAE, EACH OF SAID NONMAGNETIC CONDUCTING LAMINAE HAVING UNIFORM THICKNESS OF FROM 50 A. TO 200 A.
Claim 2
Dependent Claim
111 words
A LAMINATED MAGNETIC FILM DEVICE HAVING A TOTAL MAGNETIC FILM THICKNESS OF FROM 10,000 A. TO 40,000 A., SAID DEVICE HAVING A COERCIVITY GREATER THAN THE COERCIVITY OF AN UNLAMINATED MAGNETIC FILM DEVICE OF EQUAL THICKNESS COMPRISING A PLURALITY OF DISCRETE LAMINAE OF A MAGNETIC MATERIAL HAVING UNIFORM THICKNESS, SAID MAGNETIC MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF FE-NI ALLOY, FE-NI-CO ALLOY, AND FE-NI-P ALLOY; AND A SERIES OF DISCRETE MONMAGNETIC CONDUCTING METAL LAMINAE SELECTED FROM THE GROUP CONSISTING OF AU, AG, CU, SN, RH, PD AND PT, ALTERNATELY DISPOSED BETWEEN SAID MAGNETIC LAMINAE, EACH OF SAID NONMAGNETIC CONDUCTING LAMINAE HAVING UNIFORM THICKNESS OF FROM 50 A. TO 200 A.
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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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |