US2810324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light polarizing illuminating device
Assignee: Marks Polarized Corp
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Filing: 1954-12-02
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Granted: 1957-10-22
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Expires: 1974-12-02
Abstract
No abstract record available.
Inventors
- 👤 Alvin M Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:14
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; F; F21; F21S; F21S41/00; F21S41/10; F21S41/12; F21S41/135; G02B27/00; G02B27/28; G02B27/283; G02B27/285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |