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Patent US2983840A successfully refreshed from Google Patents.
US2983840A
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Magnetic beam-forming device
Assignee: US Philips Corp
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Filing: 1953-05-21
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Granted: 1961-05-09
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Expires: 1973-05-21
Abstract
No abstract record available.
Inventors
- 👤 Bernardus Bastiaan Van Iperen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:21
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/58; H01J29/64; H01J29/68; H01J23/00; H01J23/02; H01J23/08; H01J23/087; H01J23/0873
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2200039A
Cited
US2296355A
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US2269149A
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US2300052A
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US2305884A
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US2640162A
Cited
US2659065A
Cited
US2741718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |