US3238296A
Expired / Lapsed
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Assignee: Philips North America LLC
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Filing: 1962-03-29
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Granted: 1966-03-01
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Expires: 1982-03-29
Abstract
No abstract record available.
Inventors
- 👤 Alfred M Nelson
- 👤 Paul J Crane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:23
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
A DEVICE OF THE CLASS DESCRIBED COMPRISING THE COMBINATION OF: A MEMBER CONSISTING OF A TRANSPARENT MATERIAL AND HAVING AN INTERNALLY REFLECTIVE PLANE SURFACE ON ONE SIDE, SAID MATERIAL HAVING AN INDEX OF REFRACTION SUCH THAT LIGHT TRAVELING THROUGH SAID MEMBER AND INCIDENT ON SAID SURFACE WILL BE INTERNALLY REFLECTED BY EMERGING FROM SAID SURFACE INTO A REGION IMMEDIATELY ADJACENT SAID SURFACE AND RETURNING THROUGH SAID SURFACE INTO SAID MEMBER, AN ELECTRICALLY CONDUCTIVE FILM SECURED TO SAID SURFACE, SAID FILM BEING OPTICALLY TRANSPARENT AND DISPOSED WITHIN SAID REGION SUCH THAT SAID LIGHT WILL EMERGED FROM SAID FILM WHEN BEING INTERNALLY REFLECTED FROM SAID SURFACE, MEANS OF PRODUCING AN ELECTRICAL CHARGE ON SAID FILM, A LAYER OF A SECOND MATERIAL DISPOSED IMMEDIATELY ADJACENT SAID SURFACE, SAID LAYER HAVING A SURFACE THAT IS MOVABLE INTO AND OUT OF SAID REGION SUCH THAT LIGHT INCIDENT ON SAID LAYER WILL BE ABSORBED THEREBY, AND MEANS FOR APPLYING AN ELECTRICAL CHARGE PATTERN TO PREDETERMINED PORTIONS OF SAID LAYER, SAID CHARGE PATTERN BEING EFFECTIVE TO REACT WITH THE CHARGE ON SAID FILM FOR MOVING AT LEAST PORTIONS OF SAID LAYER AT LEAST PARTIALLY THROUGH SAID REGION TO MODULATE THE LIGHT REFLECTED FROM SAID SURFACE.
Claim 2
Independent Claim
198 words
A DEVICE OF THE CLASS DESCRIBED COMPRISING THE COMBINATION OF: A MEMBER CONSISTING OF A TRANSPARENT MATERIAL AND HAVING AN INTERNALLY REFLECTIVE PLANE SURFACE ON ONE SIDE, SAID MATERIAL HAVING AN INDEX OF REFRACTION SUCH THAT LIGHT TRAVELING THROUGH SAID MEMBER AND INCIDENT ON SAID SURFACE WILL BE INTERNALLY REFLECTED BY EMERGING FROM SAID SURFACE INTO A REGION IMMEDIATELY ADJACENT SAID SURFACE AND RETURNING THROUGH SAID SURFACE INTO SAID MEMBER, AN ELECTRICALLY CONDUCTIVE FILM SECURED TO SAID SURFACE, SAID FILM BEING OPTICALLY TRANSPARENT AND DISPOSED WITHIN SAID REGION SUCH THAT SAID LIGHT WILL EMERGED FROM SAID FILM WHEN BEING INTERNALLY REFLECTED FROM SAID SURFACE, MEANS OF PRODUCING AN ELECTRICAL CHARGE ON SAID FILM, A LAYER OF A SECOND MATERIAL DISPOSED IMMEDIATELY ADJACENT SAID SURFACE, SAID LAYER HAVING A SURFACE THAT IS MOVABLE INTO AND OUT OF SAID REGION SUCH THAT LIGHT INCIDENT ON SAID LAYER WILL BE ABSORBED THEREBY, AND MEANS FOR APPLYING AN ELECTRICAL CHARGE PATTERN TO PREDETERMINED PORTIONS OF SAID LAYER, SAID CHARGE PATTERN BEING EFFECTIVE TO REACT WITH THE CHARGE ON SAID FILM FOR MOVING AT LEAST PORTIONS OF SAID LAYER AT LEAST PARTIALLY THROUGH SAID REGION TO MODULATE THE LIGHT REFLECTED FROM SAID SURFACE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |