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Patent US3377910A successfully refreshed from Google Patents.
US3377910A
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Stabilzed optical instrument utilizing box level bubble as lens
Assignee: Carl Zeiss AG
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Filing: 1964-02-13
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Granted: 1968-04-16
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Expires: 1984-02-13
Abstract
No abstract record available.
Inventors
- 👤 Drodofsky Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:29
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/64; G02B27/646; G02B27/648
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1063761A
Cited
US1902387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |