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US2440106A
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Light-polarizing image and methods for forming the same
Assignee: Polaroid Corp
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Filing: 1946-04-26
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Granted: 1948-04-20
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Expires: 1966-04-26
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
- 👤 Mahler Joseph
- 👤 Jr Mark Hyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:41
CPC Classifications
G; G03; G03C; G03C9/00; G03C9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US175009A
Cited
US217404A
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US1214940A
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US2185018A
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GB526780A
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US2204604A
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US2409923A
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US2409959A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |