Patent US2714707A successfully refreshed from Google Patents.
US2714707A
Expired / Lapsed
US
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Circular polarizer
Assignee: Individual
•
Filing: 1946-05-03
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Granted: 1955-08-02
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Expires: 1966-05-03
Abstract
No abstract record available.
Inventors
- 👤 Carroll W Zabel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:24
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/165; H01P1/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2106769A
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US2241119A
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US2407318A
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US2416080A
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US2607849A
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US2466136A
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US2473274A
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US2438521A
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US2562332A
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US2686901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-01 | 1959-01-31 | 1959-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-01 | 1963-01-31 | 1963-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-01 | 1967-01-31 | 1967-08-02 | $7700.00 | Window Closed / Lapsed |