US3290619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly efficient devices using centrosymmetric perovskite crystals biased to severalpi phase retardations
Assignee: AT&T Inc
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Filing: 1964-03-19
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Granted: 1966-12-06
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Expires: 1984-03-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Geusic
- 👤 Legrand G Van Uitert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:11
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04; C; C04; C04B; C04B35/00; C04B35/01; C04B35/495; C30; C30B; C30B15/00; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/30; G; G02; G02F; G02F1/00; G02F1/0009; G02F1/0018; G02F1/01; G02F1/03; G02F1/0344; G02F1/29; G02F1/33; G02F1/35; G02F1/37; G02F1/39; H03B; H03B19/00; H03B19/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
DEVICE COMPRISING A BODY CONSISTING ESSENTIALLY OF AN ELECTRO-OPTIC PEROVSKITE CRYSTALLINE MATERIAL HAVING A CENTER OF SYMMETRY, TOGETHER WITH A FIRST MEANS FOR APPLYING A BIASING ELECTRICAL FIELD ACROSS AT LEAST A PORTION OF THE SAID BODY, THE SAID BIASING ELECTRIC FIELD BEING OF SUFFICIENT MAGNITUDE TO BIAS THE SAID BODY TO SEVERAL $ PHASE RETARDATIONS, TOGETHER WITH A SECOND MEANS FOR APPLYING A MODULATING ELECTRIC FIELD ACROSS AT LEAST A PORTION OF THE SAID BODY, THE MAXIMUM VALUE OF SAID MODULATING ELECTRID FIELD BEING SUFFICIENT TO PRODUCE AN ADDITIONAL $ PHASE RETARDATION, AND TOGETHER WITH MEANS FOR TRANSMITTING ELECTROMAGNETIC WAVE ENERGY THROUGH A PORTION OF THE SAID BODY, THE RELATIONSHIP BETWEEN THE SAID SECOND MEANS AND THE SAID ELECTROMAGNETIC WAVE ENERGY BEING SUCH THAT A VARIATION IN THE FORMER PRODUCES A VARIATION IN THE LATTER.
Claim 2
Dependent Claim
136 words
DEVICE COMPRISING A BODY CONSISTING ESSENTIALLY OF AN ELECTRO-OPTIC PEROVSKITE CRYSTALLINE MATERIAL HAVING A CENTER OF SYMMETRY, TOGETHER WITH A FIRST MEANS FOR APPLYING A BIASING ELECTRICAL FIELD ACROSS AT LEAST A PORTION OF THE SAID BODY, THE SAID BIASING ELECTRIC FIELD BEING OF SUFFICIENT MAGNITUDE TO BIAS THE SAID BODY TO SEVERAL $ PHASE RETARDATIONS, TOGETHER WITH A SECOND MEANS FOR APPLYING A MODULATING ELECTRIC FIELD ACROSS AT LEAST A PORTION OF THE SAID BODY, THE MAXIMUM VALUE OF SAID MODULATING ELECTRID FIELD BEING SUFFICIENT TO PRODUCE AN ADDITIONAL $ PHASE RETARDATION, AND TOGETHER WITH MEANS FOR TRANSMITTING ELECTROMAGNETIC WAVE ENERGY THROUGH A PORTION OF THE SAID BODY, THE RELATIONSHIP BETWEEN THE SAID SECOND MEANS AND THE SAID ELECTROMAGNETIC WAVE ENERGY BEING SUCH THAT A VARIATION IN THE FORMER PRODUCES A VARIATION IN THE LATTER.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |