US3671102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamellar eutectic insb sb films as infrared polarizers
Assignee: United States Department of the Navy
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Filing: 1971-01-15
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Granted: 1972-06-20
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Expires: 1991-01-15
Abstract
Abstract AN OPTICAL POLARIZER OF LAMELLAR EUTECTIC INSB+SB FILMS GROWN BY ELECTRON BEAM MICROZONE CRYSTALLIZATION FOR USE IN THE INFRARED REGION BEYOND 6 MICRONS WAVELENGTH.
Inventors
- 👤 Arthur R Clawson
- 👤 Neil M Davis
- 👤 Harry H Weider
- 👤 David A Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:50
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/46; B25B13/461; C; C30; C30B; C30B21/00; C30B21/02; G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3058
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |