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Patent US3458244A successfully refreshed from Google Patents.
US3458244A
Expired / Lapsed
US
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Optical system of the zoom type
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1966-12-27
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Granted: 1969-07-29
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Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 Walter Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:07
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02; G02B21/025; G02B15/00; G02B15/14; G02B15/142; G02B15/1421
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2209532A
Cited
US2433674A
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US2536718A
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US3030861A
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US3030857A
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US3185029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |