US2777958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic electron lens
Assignee: Hartford National Bank and Trust Co
•
Filing: 1952-01-14
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Granted: 1957-01-15
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Expires: 1972-01-14
Abstract
No abstract record available.
Inventors
- 👤 Poole Jan Bart Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:39
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/58; H01J29/64; H01J37/00; H01J37/02; H01J37/04; H01J37/147; H01J49/00; H01J49/44; H01J49/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2636999A
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US2143579A
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US2272165A
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US2260041A
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US2469964A
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US2551544A
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US2457495A
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US2447260A
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US2429558A
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US2435386A
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US2533687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |