Patent US3245314A successfully refreshed from Google Patents.
US3245314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical rotation devices employing a ferromagnetic chromium trihalide
Assignee: AT&T Inc
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Filing: 1962-06-28
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Granted: 1966-04-12
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Expires: 1982-06-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph F Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:26
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A LIGHT ROATION DEVICE COMPRISING A TRANSMITTING AND ROTATING MEDIUM OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE CHROMIUM TRIHALIDES WHICH ARE FERROMAGNETIC BELOW THEIR CURIE POINT AND WHICH EXHIBIT A NET MAGENTIC MOMENT IN THE PRESENCE OF AN APPLIED MAGNETIC BIASING FIELD, MEANS FOR APPLYING LINEARLY POLARIZED LIGHT WAVES TO SAID MEDIUM, MEANS FOR ANALYZING SAID WAVES AFTER TRAVERSING SAID MEDIUM; MEANS FOR MAINTAINING THE TEMPERATURE OF SAID MEDIUM BELOW ITS CURIE POINT, AND MEANS FOR MAGNETICALLY SATURATING SAID MEDIUM, SAID LAST MENTIONED MEANS BEING ADAPTED TO PROVIDE A FINITE NONZERO MAGNETIC FIELD COMPONENT PARALLEL TO THE DIRECTION OF TRAVEL OF SAID WAVES.
Claim 2
Dependent Claim
105 words
A LIGHT ROATION DEVICE COMPRISING A TRANSMITTING AND ROTATING MEDIUM OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE CHROMIUM TRIHALIDES WHICH ARE FERROMAGNETIC BELOW THEIR CURIE POINT AND WHICH EXHIBIT A NET MAGENTIC MOMENT IN THE PRESENCE OF AN APPLIED MAGNETIC BIASING FIELD, MEANS FOR APPLYING LINEARLY POLARIZED LIGHT WAVES TO SAID MEDIUM, MEANS FOR ANALYZING SAID WAVES AFTER TRAVERSING SAID MEDIUM; MEANS FOR MAINTAINING THE TEMPERATURE OF SAID MEDIUM BELOW ITS CURIE POINT, AND MEANS FOR MAGNETICALLY SATURATING SAID MEDIUM, SAID LAST MENTIONED MEANS BEING ADAPTED TO PROVIDE A FINITE NONZERO MAGNETIC FIELD COMPONENT PARALLEL TO THE DIRECTION OF TRAVEL OF SAID WAVES.
References Cited (Backward Citations)
US2974568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |