US2669902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binocular optical system
Assignee: General Electric Co
•
Filing: 1950-09-26
•
Granted: 1954-02-23
•
Expires: 1970-09-26
Abstract
No abstract record available.
Inventors
- 👤 Norman F Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:22
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/02; G02B23/08; G02B27/00; G02B27/28; G02B27/283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1870465A
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GB224393A
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US2118160A
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US2100348A
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US2123743A
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US2178145A
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US2241041A
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US2262524A
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US2282947A
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US2373249A
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US2403731A
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US2418627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |