US2579273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic lens for electron optical systems
Assignee: RCA Corp
•
Filing: 1949-05-21
•
Granted: 1951-12-18
•
Expires: 1969-05-21
Abstract
No abstract record available.
Inventors
- 👤 Jr John H Reisner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:46
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/04; H01J37/10; H01J37/14; H01J37/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2503173A
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US2533689A
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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) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |