US3429637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-reciprocal optical device
Assignee: Westinghouse Electric Corp
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Filing: 1965-11-04
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Granted: 1969-02-25
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Expires: 1985-11-04
Abstract
No abstract record available.
Inventors
- 👤 John L Wentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:58
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/0344
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
LIGHT TRANSMISSION APPARATUS COMPRISING A PAIR OF ELONGATED BIREFRINGENT CRYSTALS HAVING THEIR PHYSICAL AXES IN COAXIAL ALIGNMENT AND THEIR OPTIC AXES TRANSVERSE TO THEIR LONGITUDINAL AXES, THE OPTIC AXES OF SAID CRYSTALS ALSO BEING ORTHOGONAL TO EACH OTHER, MICROWAVE STRUCTURE FOR PROPAGATING MICROWAVES SURROUNDING SAID CRYSTALS, SAID MICROWAVE STRUCTURE INCLUDING RESPECTIVE PORTIONS HAVING THEIR E VECTORS, RESPECTIVELY, PERPENDICULAR TO EACH OTHER AND PARALLEL, RESPECTIVELY, TO THE OPTIC AXES OF THE CRYSTAL WHICH THEY SURROUND.
Claim 2
Dependent Claim
74 words
LIGHT TRANSMISSION APPARATUS COMPRISING A PAIR OF ELONGATED BIREFRINGENT CRYSTALS HAVING THEIR PHYSICAL AXES IN COAXIAL ALIGNMENT AND THEIR OPTIC AXES TRANSVERSE TO THEIR LONGITUDINAL AXES, THE OPTIC AXES OF SAID CRYSTALS ALSO BEING ORTHOGONAL TO EACH OTHER, MICROWAVE STRUCTURE FOR PROPAGATING MICROWAVES SURROUNDING SAID CRYSTALS, SAID MICROWAVE STRUCTURE INCLUDING RESPECTIVE PORTIONS HAVING THEIR E VECTORS, RESPECTIVELY, PERPENDICULAR TO EACH OTHER AND PARALLEL, RESPECTIVELY, TO THE OPTIC AXES OF THE CRYSTAL WHICH THEY SURROUND.
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) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |