US3700308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light polarizing prism of zircon
Assignee: O NICOLAI VAN
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Filing: 1971-03-22
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Granted: 1972-10-24
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Expires: 1991-03-22
Abstract
Abstract A laser beam splitting polarizer is constructed of zircon. Zircon can give about a 90* spread between the ordinary and extraordinary rays and is rugged enough to withstand high powered laser beams.
Inventors
- 👤 O Van Nicolai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:28
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/28; G02B27/283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |