US3254253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-electrically sensitive devices
Assignee: EMI Ltd
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Filing: 1961-12-11
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Granted: 1966-05-31
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Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 Davis Gordon Peter
- 👤 Benbow Henry Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:51
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/04; H01J40/06; H01J1/00; H01J1/02; H01J1/34; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J2201/00; H01J2201/34; H01J2201/342; H01J2201/3421; H01J2201/3426
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PHOTO-ELECTRICALLY SENSITIVE DEVICE COMPRISING A TRANSLUCENT SUBSTRATE, A PHOTO-ELECTRIALLY SENSITIVE LAYER, AND AT LEAST ONE TRANSLUCENT INTERMEDIATE LAYER BETWEEN THE SENSITIVE LAYER AND THE TRANSLUCENT SUBSTRATE, SAID LAYERS BEING RESPECTIVELY ADHERENT TO THE LAYER BENEATH AND TO THE TRANSLUCENT SUBSTRATE, THE SENSITIVE LAYER HAVING A REFRACTIVE INDEX WHICH IS HIGHER THAN THAT OF THE TRANSLUCENT SUBSTRATE, THE AT LEAST ONE TRANSLUCENT INTERMEDIATE LAYER HAVING A REFRACTIVE INDEX WHICH IS INTERMEDIATE THE REFRACTIVE INDICES OF THE SENSITIVE LAYER AND THE SUBSTRATE, AND THE INTERMEDIATE LAYER HAVING A THICKNESS WHICH IS AN ODD MULTIPLE OF A 1/4 WAVE LENGTH OF LIGHT OF A PARTICULAR WAVE LENGTH TO WHICH THE DEVICE IS SENSITIVE SO THAT LIGHT REFLECTIONS FROM THE SUCCESSIVE INTERFACES BETWEEN THE SUBSTRATE AND LAYERS ARE SUBSTANTIALLY MUTUALLY CANCELLING.
Claim 2
Dependent Claim
128 words
A PHOTO-ELECTRICALLY SENSITIVE DEVICE COMPRISING A TRANSLUCENT SUBSTRATE, A PHOTO-ELECTRIALLY SENSITIVE LAYER, AND AT LEAST ONE TRANSLUCENT INTERMEDIATE LAYER BETWEEN THE SENSITIVE LAYER AND THE TRANSLUCENT SUBSTRATE, SAID LAYERS BEING RESPECTIVELY ADHERENT TO THE LAYER BENEATH AND TO THE TRANSLUCENT SUBSTRATE, THE SENSITIVE LAYER HAVING A REFRACTIVE INDEX WHICH IS HIGHER THAN THAT OF THE TRANSLUCENT SUBSTRATE, THE AT LEAST ONE TRANSLUCENT INTERMEDIATE LAYER HAVING A REFRACTIVE INDEX WHICH IS INTERMEDIATE THE REFRACTIVE INDICES OF THE SENSITIVE LAYER AND THE SUBSTRATE, AND THE INTERMEDIATE LAYER HAVING A THICKNESS WHICH IS AN ODD MULTIPLE OF A 1/4 WAVE LENGTH OF LIGHT OF A PARTICULAR WAVE LENGTH TO WHICH THE DEVICE IS SENSITIVE SO THAT LIGHT REFLECTIONS FROM THE SUCCESSIVE INTERFACES BETWEEN THE SUBSTRATE AND LAYERS ARE SUBSTANTIALLY MUTUALLY CANCELLING.
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |