Patent US3143655A successfully refreshed from Google Patents.
US3143655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive switching device in a waveguide
Assignee: Individual
•
Filing: 1960-01-25
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Granted: 1964-08-04
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Expires: 1980-01-25
Abstract
No abstract record available.
Inventors
- 👤 Malcolm W P Strandberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:30
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/10; H01P1/12; H03; H03K; H03K17/00; H03K17/51; H03K17/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
ELECTRICAL SWITCHING APPARATUS COMPRISING, IN COMBINATION, AN ELECTRICALLY ACTUATED DEVICE HAVING A PLURALITY OF LUMINOUS SOURCES, A LIKE PLURALITY OF PHOTOCONDUCTIVE ELEMENTS SPACED FROM SAID LUMINOUS SOURCES, AND OPTICAL MEANS FOR CONCENTRATING LUMINOUS ENERGY FROM EACH OF SAID SOURCES UPON A RESPECTIVE ONE OF SAID PHOTOCONDUCTIVE ELEMENTS, AND A LIGHT-TIGHT ELECTRICALLY CONDUCTIVE WAVEGUIDE BEYOND CUTOFF FOR SUBSTANTIALLY ATTENUATING ELECTRIC FIELD RADIATIONS FROM SAID LUMINOUS SOURCES IN THE TRANSMISSION PATH TO SAID PHOTOCONDUCTIVE ELEMENTS AT FRE-
Claim 2
Dependent Claim
75 words
ELECTRICAL SWITCHING APPARATUS COMPRISING, IN COMBINATION, AN ELECTRICALLY ACTUATED DEVICE HAVING A PLURALITY OF LUMINOUS SOURCES, A LIKE PLURALITY OF PHOTOCONDUCTIVE ELEMENTS SPACED FROM SAID LUMINOUS SOURCES, AND OPTICAL MEANS FOR CONCENTRATING LUMINOUS ENERGY FROM EACH OF SAID SOURCES UPON A RESPECTIVE ONE OF SAID PHOTOCONDUCTIVE ELEMENTS, AND A LIGHT-TIGHT ELECTRICALLY CONDUCTIVE WAVEGUIDE BEYOND CUTOFF FOR SUBSTANTIALLY ATTENUATING ELECTRIC FIELD RADIATIONS FROM SAID LUMINOUS SOURCES IN THE TRANSMISSION PATH TO SAID PHOTOCONDUCTIVE ELEMENTS AT FRE-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |