US3753665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic film plated wire
Assignee: General Electric Co
•
Filing: 1970-11-12
•
Granted: 1973-08-21
•
Expires: 1990-11-12
Abstract
Abstract A small diameter magnetic film plated wire for memory devices is constructed utilizing an inner core selected from the group consisting of tungsten and molybdenum. In a preferred embodiment of the magnetic film plated wire, a tungsten core is successively overlaid with a gold strike layer, a rapidly deposited relatively thick copper conductive layer, a slowly deposited smooth copper layer, a gold layer and a circumferentially oriented magnetic nickel-iron film.
Inventors
- 👤 Cary R Mc
- 👤 F Luborsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:58
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/013; B21; B21F; B21F19/00; Y; Y10; Y10S; Y10S205/00; Y10S205/922; Y10S428/00; Y10S428/90; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/12; Y10T428/12451; Y10T428/12465; Y10T428/12493; Y10T428/12639; Y10T428/12646; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12833; Y10T428/12861; Y10T428/12889; Y10T428/12993
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
A magnetic film plated wire for memory devices as set forth in claim 1 wherein said first copper layer is from approximately 0.25 to 0.50 mils in thickness and said second copper layer is from approximately 0.04 to 0.2 mils in thickness.
Claim 2
Dependent Claim
32 words
A magnetic film plated wire for memory devices as set forth in claim 1 wherein said second degree of surface smoothness comprises a smoother surface than that of said first copper layer.
Claim 3
Dependent Claim
22 words
A magnetic film plated wire as set forth in claim 1 wherein said core is tungsten and said strike layer is gold.
Claim 4
Dependent Claim
25 words
A magnetic film plated wire as set forth in claim 4 further comprising a gold layer between said second copper film and said magnetic layer.
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |