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US2872721A
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US
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Electron image multiplier apparatus
Assignee: Individual
•
Filing: 1957-04-11
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Granted: 1959-02-10
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Expires: 1977-04-11
Abstract
No abstract record available.
Inventors
- 👤 Mcgee James Dwyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:39
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/22; H01J29/00; H01J29/02; H01J29/023; H01J31/00; H01J31/08; H01J31/50; H01J31/506; H01J31/507
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2619438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |