US2517170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binocular viewing apparatus for microfilms and the like
Assignee: Individual
•
Filing: 1945-06-26
•
Granted: 1950-08-01
•
Expires: 1965-06-26
Abstract
No abstract record available.
Inventors
- 👤 Bernard Maurice Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:13
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/022; G02B27/024; G02B27/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2279967A
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US607171A
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US230320A
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US701788A
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US1240905A
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GB149636A
Cited
US1543188A
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US1470670A
Cited
US1504989A
Cited
GB292784A
Cited
US1963788A
Cited
US2279904A
Cited
US2372192A
Cited
US2377109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-31 | 1954-01-30 | 1954-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-31 | 1958-01-30 | 1958-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-31 | 1962-01-30 | 1962-08-01 | $7700.00 | Window Closed / Lapsed |