Patent US2994067A successfully refreshed from Google Patents.
US2994067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic systems
Assignee: RCA Corp
•
Filing: 1954-12-07
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Granted: 1961-07-25
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Expires: 1974-12-07
Abstract
No abstract record available.
Inventors
- 👤 Jan A Rajchman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:29
CPC Classifications
H; H01; H01F; H01F3/00; H01F3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2661453A
Cited
US2640164A
Cited
US2808578A
Cited
US2719885A
Cited
US2800626A
Cited
US2805407A
Cited
US2818554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |