Patent US2594740A successfully refreshed from Google Patents.
US2594740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic light amplifier
Assignee: Individual
•
Filing: 1950-02-17
•
Granted: 1952-04-29
•
Expires: 1970-02-17
Abstract
No abstract record available.
Inventors
- 👤 Forest Lee De
- 👤 William A Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:24
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H10; H10F; H10F55/00; H10F55/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2060977A
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US2021907A
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US2120916A
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US2196691A
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US2305179A
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US2563474A
Cited
US2495697A
Cited
US2555423A
Cited
US2555424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |