US3422407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices utilizing a cobalt-vanadium-iron magnetic material which exhibits a composite hysteresis loop
Assignee: AT&T Inc
•
Filing: 1965-04-21
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Granted: 1969-01-14
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Expires: 1985-04-21
Abstract
No abstract record available.
Inventors
- 👤 Harold L B Gould
- 👤 Daniel H Wenny Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:51
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; G; G11; G11C; G11C11/00; G11C11/02; G11C11/14; G11C11/155; H01F1/0302; H01F1/0304
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
DEVICE COMPRISING A FERROMAGNETIC BODY COMPRISING AN ALLOY CONSISTING ESSENTIALLY OF 78 TO 95 WEIGHT PERCENT COBALT, 4.5 TO 11 WEIGHT PERCENT VANADIUM, REMAINDER IRON, PRODUCED BY COLD WORK SO AS TO PRODUCE A THICKNESS REDUCTION OF AT LEAST 90 PERCENT BASAED ON THE RATIO:
Claim 2
Dependent Claim
45 words
DEVICE COMPRISING A FERROMAGNETIC BODY COMPRISING AN ALLOY CONSISTING ESSENTIALLY OF 78 TO 95 WEIGHT PERCENT COBALT, 4.5 TO 11 WEIGHT PERCENT VANADIUM, REMAINDER IRON, PRODUCED BY COLD WORK SO AS TO PRODUCE A THICKNESS REDUCTION OF AT LEAST 90 PERCENT BASAED ON THE RATIO:
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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) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |