Patent US3069974A successfully refreshed from Google Patents.
US3069974A
Expired / Lapsed
US
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Multi-layered light polarizers
Assignee: Individual
•
Filing: 1959-11-12
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Granted: 1962-12-25
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Expires: 1979-11-12
Abstract
No abstract record available.
Inventors
- 👤 Alvin M Murks
- 👤 Mortimer M Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:51
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3066; G02B5/3033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2402176A
Cited
GB457542A
Cited
GB460666A
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US2252898A
Cited
US2403731A
Cited
US2453379A
Cited
US2687673A
Cited
US2887566A
Cited
US2982178A
Cited
US3024701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |