US2989480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferromagnetic material
Assignee: AT&T Inc
•
Filing: 1958-11-18
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Granted: 1961-06-20
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Expires: 1978-11-18
Abstract
No abstract record available.
Inventors
- 👤 Bernd T Matthias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:00
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/80; H10N60/85; C; C22; C22C; C22C28/00; C22C5/00; C22C5/04; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10S428/93; Y10S428/931; Y10S505/00; Y10S505/80; Y10S505/801; Y10S505/803; Y10S505/812; Y10S505/813; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12778
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A MATERIAL CONSISTING ESSENTIALLY OF A COMPOSITION CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
11 words
A MATERIAL CONSISTING ESSENTIALLY OF A COMPOSITION CORRESPONDING TO THE FORMULA
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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |