Patent US2460461A successfully refreshed from Google Patents.
US2460461A
Expired / Lapsed
US
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Spring actuated telescoping periscope
Assignee: Individual
•
Filing: 1946-01-15
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Granted: 1949-02-01
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Expires: 1966-01-15
Abstract
No abstract record available.
Inventors
- 👤 Cordelia E O Larkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:59
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/02; G02B23/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE230064C
Cited
US1313534A
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FR398622A
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US1175609A
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US1486231A
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US1466567A
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US1635011A
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US1644902A
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US1900930A
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US2398354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-01 | 1952-08-02 | 1953-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-01 | 1956-08-02 | 1957-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-01 | 1960-08-02 | 1961-02-01 | $7700.00 | Window Closed / Lapsed |