Patent US3522985A successfully refreshed from Google Patents.
US3522985A
Expired / Lapsed
US
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High-transmission light polarizer
Assignee: Polaroid Corp
•
Filing: 1965-10-23
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Granted: 1970-08-04
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Howard G Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:35
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2152297A
Cited
US2180114A
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US2270535A
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US2420279A
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US2700919A
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US3060808A
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US3218926A
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US3274881A
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US3213753A
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US3329474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |