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US3464757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Day-night optical viewing device
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1965-10-22
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Granted: 1969-09-02
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Horst Schmidt
- 👤 Hellmut Bohmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:00
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1290746A
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US1967214A
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US2152726A
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US2946255A
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US2903592A
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US2970220A
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US3064526A
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US3173012A
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US3324300A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |