Patent US3464759A successfully refreshed from Google Patents.
US3464759A
Expired / Lapsed
US
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Stereoscopic observation devices
Assignee: Jenoptik AG
•
Filing: 1965-12-02
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Granted: 1969-09-02
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Expires: 1985-12-02
Abstract
No abstract record available.
Inventors
- 👤 Horst Scholer
- 👤 Klaus Herda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:15
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/18; G02B21/20; G02B21/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US983569A
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US1798396A
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US2401709A
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US2634654A
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US2857523A
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US3062099A
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SU135651A1
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FR1273776A
Cited
US3186300A
Cited
US3170983A
Cited
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 |