US3268879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magneto-optic readout system
Assignee: Unisys Corp
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Filing: 1965-11-01
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Granted: 1966-08-23
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Expires: 1985-11-01
Abstract
No abstract record available.
Inventors
- 👤 Stanley J Lins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:45
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/09; G11; G11C; G11C13/00; G11C13/04; G11C13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A KERR MAGNETO-OPTIC SYSTEM FOR QUANTITATIVELY DETERMINING THE MAGNETIC STATE OF A MAGNETIC DEVICE CAPABLE OF ASSUMING FIRST AND SECOND STABLE MAGNETIC STATES AND WHICH HAS INTERMEDIATE MAGNETIC STATES WHICH HAVE BOTH FIRST AND SECOND MAGNETIC DOMAINS, SAID SYSTEM COMPRISING: (A) MEANS FOR REFLECTING POLARIZED LIGHT FROM A MAGNETIC DEVICE, SAID REFLECTED LIGHT BEING ROTATED IN CLOCKWISE AND COUNTERCLOCKWISE DIRECTIONS BEACAUSE OF THE KERR MAGNETIC-OPTIC EFFECT OF SAID FIRST AND SECOND MAGNETIC DOMAINS; (B) A FIRST LIGHT UTILIZATION CHANNEL FOR RECEIVING SAID REFLECTED LIGHT FROM SAID FIRST MAGNETIC DOMAINS AND PRODUCING A FIRST SIGNAL PROPORTIONAL TO THE AREA OF THE FIRST MAGNETIC DOMAINS PRESENT IN SAID DEVICE; (C) A SECOND LIGHT UTILIZATION CHANNEL FOR RECEIVING SAID REFLECTED LIGHT FROM SAID SECOND MAGNETIC DOMAINS
Claim 2
Dependent Claim
123 words
A KERR MAGNETO-OPTIC SYSTEM FOR QUANTITATIVELY DETERMINING THE MAGNETIC STATE OF A MAGNETIC DEVICE CAPABLE OF ASSUMING FIRST AND SECOND STABLE MAGNETIC STATES AND WHICH HAS INTERMEDIATE MAGNETIC STATES WHICH HAVE BOTH FIRST AND SECOND MAGNETIC DOMAINS, SAID SYSTEM COMPRISING: (A) MEANS FOR REFLECTING POLARIZED LIGHT FROM A MAGNETIC DEVICE, SAID REFLECTED LIGHT BEING ROTATED IN CLOCKWISE AND COUNTERCLOCKWISE DIRECTIONS BEACAUSE OF THE KERR MAGNETIC-OPTIC EFFECT OF SAID FIRST AND SECOND MAGNETIC DOMAINS; (B) A FIRST LIGHT UTILIZATION CHANNEL FOR RECEIVING SAID REFLECTED LIGHT FROM SAID FIRST MAGNETIC DOMAINS AND PRODUCING A FIRST SIGNAL PROPORTIONAL TO THE AREA OF THE FIRST MAGNETIC DOMAINS PRESENT IN SAID DEVICE; (C) A SECOND LIGHT UTILIZATION CHANNEL FOR RECEIVING SAID REFLECTED LIGHT FROM SAID SECOND MAGNETIC DOMAINS
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |