US3511558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doublet which is partially corrected spherically,chromatically and astigmatically
Assignee: Voigtlander AG
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Filing: 1966-06-07
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Granted: 1970-05-12
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Expires: 1986-06-07
Abstract
No abstract record available.
Inventors
- 👤 Fritz Uberhagen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:46
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/0025; G02B13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |