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US2830495A
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Wide angle anastigmatic objective comprising two negative meniscus inner components enclosed by outer positive meniscus components
Assignee: Carl Zeiss AG
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Filing: 1953-08-05
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Granted: 1958-04-15
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Expires: 1973-08-05
Abstract
No abstract record available.
Inventors
- 👤 Koch Friedrich
- 👤 Richter Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:10
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2031792A
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US2116264A
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US2325275A
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US2430150A
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US2383115A
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US2518719A
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US2596799A
Cited
GB656011A
Cited
US2559875A
Cited
GB689916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |