US3330631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic data storage devices
Assignee: NCR Voyix Corp
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Filing: 1966-09-23
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Granted: 1967-07-11
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Expires: 1986-09-23
Abstract
No abstract record available.
Inventors
- 👤 Tsu Ignatius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:46
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/10; C25D5/60; C25D5/615; C25D5/617; H; H01; H01F; H01F10/00; H01F10/26; H01F10/28; Y; Y10; Y10S; Y10S205/00; Y10S205/922; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431; Y10T428/12438; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/1291; Y10T428/12917; Y10T428/12986
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A MAGNETIC DATA STORAGE DEIVCE COMPRISING A STIFF, RESILIENT, AND WIRE-LIKE SUBSTRATE OF AN ALLOY OF PHOSPHORBRONZE OF COPPER- BERYLLIUM, THE SUBSTRATE HAVING AN AVERAGE DIAMETER ON THE ORDER OF 5 TO 50 MILS AND HAVING A SUBSTANTIALLY UNIFORM STRUCTURAL CROSS-SECTION THROUGHOUT A MAJOR PORTION OF ITS LENGTH, AND A SATURABLE FERROMAGNETIC COATING HAVING A SUBSTANTIALLY RECTANGULAR HYSTERESIS CHARACTERISTIC, SAID FERROMAGNETIC COATING EXTENDING THROUGHOUT A MAJOR PORTION OF THE LENGTH OF THE SUBSTRATE, THE IMPROVEMENT COMPRISING AN INTERMEDIATE COATING OF COPPER EXTENDING THROUGHOUT A MAJOR PORTION OF THE LENGTH OF THE SUBSTRATE AND HAVING A RANDOMLY-ORIENTED FINEGRAINED SURFACE, SAID COPPER COATING BEING DEPOSITED ON THE SUBSTRATE TO SUBSTANTIALLY ELIMINATE THE SURFACE EFFECT OF THE SUBSTRATE UPON THE SATURABLE FERROMAGNETIC COATING, THE FERROMAGNETIC COATING BEING DEPOSITED ON THE COPPER COATING.
Claim 2
Dependent Claim
130 words
IN A MAGNETIC DATA STORAGE DEIVCE COMPRISING A STIFF, RESILIENT, AND WIRE-LIKE SUBSTRATE OF AN ALLOY OF PHOSPHORBRONZE OF COPPER- BERYLLIUM, THE SUBSTRATE HAVING AN AVERAGE DIAMETER ON THE ORDER OF 5 TO 50 MILS AND HAVING A SUBSTANTIALLY UNIFORM STRUCTURAL CROSS-SECTION THROUGHOUT A MAJOR PORTION OF ITS LENGTH, AND A SATURABLE FERROMAGNETIC COATING HAVING A SUBSTANTIALLY RECTANGULAR HYSTERESIS CHARACTERISTIC, SAID FERROMAGNETIC COATING EXTENDING THROUGHOUT A MAJOR PORTION OF THE LENGTH OF THE SUBSTRATE, THE IMPROVEMENT COMPRISING AN INTERMEDIATE COATING OF COPPER EXTENDING THROUGHOUT A MAJOR PORTION OF THE LENGTH OF THE SUBSTRATE AND HAVING A RANDOMLY-ORIENTED FINEGRAINED SURFACE, SAID COPPER COATING BEING DEPOSITED ON THE SUBSTRATE TO SUBSTANTIALLY ELIMINATE THE SURFACE EFFECT OF THE SUBSTRATE UPON THE SATURABLE FERROMAGNETIC COATING, THE FERROMAGNETIC COATING BEING DEPOSITED ON THE COPPER COATING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |