Patent US3420601A successfully refreshed from Google Patents.
US3420601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Materials and structures for optical faraday rotation devices
Assignee: American Optical Corp
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Filing: 1965-06-24
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Granted: 1969-01-07
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Expires: 1985-06-24
Abstract
No abstract record available.
Inventors
- 👤 Robert W Young
- 👤 Robert E Graf
- 👤 Charles C Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:35
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A FARADAY ROTATION DEVICE PROVIDING GOOD LIGHT TRANSMISSION CHARACTERISTICS FOR OPTICAL ENERGY OF A PRESELECTED WAVELENGTH WHEN PASSING THERETHROUGH AND HAVING A LARGE VERDET CONSTANT AT SAID WAVELENGTH WHEN SUBJECTED TO A PREDETERMINED MAGNETIC FIELD, SAID DEVICE COMPRISING AN ELONGATED MEMBER OF GLASS AND MAGNETIC MEANS DISPOSED IN ADJACENT RELATION TO SIDE WALL PORTIONS THEREOF FOR SUBJECTING SAID MEMBER TO THE MAGNETIC FIELD OF SAID MAGNETIC MEANS, SAID GLASS MEMBER BEING FORMED OF A ZINC BORATE GLASS HAVING AS AN ESSENTIAL INGREDIENT THEREOF A SUBSTANTIAL AMOUNT OF A TRIVALENT RARE EARTH METAL OXIDE.
Claim 2
Dependent Claim
93 words
A FARADAY ROTATION DEVICE PROVIDING GOOD LIGHT TRANSMISSION CHARACTERISTICS FOR OPTICAL ENERGY OF A PRESELECTED WAVELENGTH WHEN PASSING THERETHROUGH AND HAVING A LARGE VERDET CONSTANT AT SAID WAVELENGTH WHEN SUBJECTED TO A PREDETERMINED MAGNETIC FIELD, SAID DEVICE COMPRISING AN ELONGATED MEMBER OF GLASS AND MAGNETIC MEANS DISPOSED IN ADJACENT RELATION TO SIDE WALL PORTIONS THEREOF FOR SUBJECTING SAID MEMBER TO THE MAGNETIC FIELD OF SAID MAGNETIC MEANS, SAID GLASS MEMBER BEING FORMED OF A ZINC BORATE GLASS HAVING AS AN ESSENTIAL INGREDIENT THEREOF A SUBSTANTIAL AMOUNT OF A TRIVALENT RARE EARTH METAL OXIDE.
References Cited (Backward Citations)
US3318652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |