Patent US2490091A successfully refreshed from Google Patents.
US2490091A
Expired / Lapsed
US
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Self-luminous reticle
Assignee: Individual
•
Filing: 1945-02-14
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Granted: 1949-12-06
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Expires: 1965-02-14
Abstract
No abstract record available.
Inventors
- 👤 Robert E Reardon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:17
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/32; G02B27/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US804624A
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US1272326A
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US1302353A
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US1529643A
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US1760727A
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US2270307A
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US2344887A
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US2324532A
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US2392979A
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US2403316A
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US2393308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |