Patent US3289002A successfully refreshed from Google Patents.
US3289002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical switching device using two photosensitive cells within an opaque housing
Assignee: Individual
•
Filing: 1961-04-25
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Granted: 1966-11-29
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Expires: 1981-04-25
Abstract
No abstract record available.
Inventors
- 👤 Robert M Goodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:24
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
AN ELECTRO-OPTICAL DEVICE COMPRISING: FIRST AND SECOND PHOTOCONDUCTIVE CELLS HAVING PHOTO-SENSITIVE AREAS DISPOSED TOWARD THE RESPECTIVE ENDS THEREOF, SAID CELLS BEING COAXIALLY ALIGNED WITH SAID ENDS HAVING SAID PHOTOSENSITIVE AREAS FACING ONE ANOTHER, TUBULAR MEANS SURROUNDING SAID CELLS AND BEING SUBSTANTIALLY COAXIAL THEREWITH, MEANS BETWEEN SAID PHOTOSENSITIVE AREAS HAVING AN AXIAL APERTURE THERETHROUGH, AND INCANDESCENT MEANS DISPOSED IN SAID APERTURE AND CONSTRUCTED TO EMIT LIGHT ONTO BOTH OF SAID AREAS, SAID APERTURED MEANS HAVING SAID APERTURE LARGE AT OPPOSITE ENDS THEREOF AND DECREASING TOWARD THE CENTER THEREOF, THE INNER SURFACES OF SAID APERTURED MEANS BEING SUBSTANTIALLY REFLECTIVE OF SAID LIGHT, SAID TUBULAR MEANS BEING OPAQUE TO SAID LIGHT AND ALSO
Claim 2
Dependent Claim
110 words
AN ELECTRO-OPTICAL DEVICE COMPRISING: FIRST AND SECOND PHOTOCONDUCTIVE CELLS HAVING PHOTO-SENSITIVE AREAS DISPOSED TOWARD THE RESPECTIVE ENDS THEREOF, SAID CELLS BEING COAXIALLY ALIGNED WITH SAID ENDS HAVING SAID PHOTOSENSITIVE AREAS FACING ONE ANOTHER, TUBULAR MEANS SURROUNDING SAID CELLS AND BEING SUBSTANTIALLY COAXIAL THEREWITH, MEANS BETWEEN SAID PHOTOSENSITIVE AREAS HAVING AN AXIAL APERTURE THERETHROUGH, AND INCANDESCENT MEANS DISPOSED IN SAID APERTURE AND CONSTRUCTED TO EMIT LIGHT ONTO BOTH OF SAID AREAS, SAID APERTURED MEANS HAVING SAID APERTURE LARGE AT OPPOSITE ENDS THEREOF AND DECREASING TOWARD THE CENTER THEREOF, THE INNER SURFACES OF SAID APERTURED MEANS BEING SUBSTANTIALLY REFLECTIVE OF SAID LIGHT, SAID TUBULAR MEANS BEING OPAQUE TO SAID LIGHT AND ALSO
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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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |