Patent US2764064A successfully refreshed from Google Patents.
US2764064A
Expired / Lapsed
US
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Objective lens for field glass
Assignee: Carl Zeiss AG
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Filing: 1953-08-03
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Granted: 1956-09-25
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Expires: 1973-08-03
Abstract
No abstract record available.
Inventors
- 👤 Kohler Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:49
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE189255C
Cited
US415040A
Cited
GB190515732A
Cited
GB198592A
Cited
US2437505A
Cited
US2453218A
Cited
FR1081732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |