US3060808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Achromatic polarization rotators
Assignee: American Optical Corp
•
Filing: 1958-08-01
•
Granted: 1962-10-30
•
Expires: 1978-08-01
Abstract
No abstract record available.
Inventors
- 👤 Charles J Koester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:16
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2351932A
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US2323059A
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US2441049A
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US2601175A
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US2616334A
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US2607272A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |