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US2821114A
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Symmetrical interference polarizers
Assignee: POLA LUX GES fur BLENDSCHUTZ A
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Filing: 1953-04-01
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Granted: 1958-01-28
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Expires: 1973-04-01
Abstract
No abstract record available.
Inventors
- 👤 Wiemer Kurt
- 👤 Wiemer Paul Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:11
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28; G02B27/283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2402176A
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US1328293A
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US2118160A
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GB460666A
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US2476014A
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US2437061A
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FR933540A
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US2449287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |