US2814969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prism field glass
Assignee: Carl Zeiss AG
•
Filing: 1955-03-15
•
Granted: 1957-12-03
•
Expires: 1975-03-15
Abstract
No abstract record available.
Inventors
- 👤 Kohler Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:08
CPC Classifications
G; G02; G02B; G02B23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1468762A
Cited
DE499992C
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DE501456C
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US2015527A
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CH236612A
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DE861469C
Cited
US2549158A
Cited
DE847215C
Cited
US2621564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |