US2774887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation sensing device
Assignee: Xerox Corp
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Filing: 1952-08-13
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Granted: 1956-12-18
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Expires: 1972-08-13
Abstract
No abstract record available.
Inventors
- 👤 Robert C Mcmaster
- 👤 Michael D Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:01
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
AN X-RAY DETECTOR, COMPRISING A VOLTAGE SOURCE, AN ELECTRIC CIRCUIT OPERATIVELY CONNECTED TO SAID SOURCE, SAID CIRCUIT INCLUDING A SELENIUM ELEMENT IN VITREOUS FORM IN ELECTRICAL SERIES WITH SAID SOURCE, AND MEANS FOR DETECTING CHANGES IN THE ELECTRICAL RESISTANCE OF SAID ELEMENT, SAID VITREOUS FROM SELENIUM BEING CHARACTERIZED BY THE PROPERTY OF VARYING IN ELECTRICAL RESISTANCE IN RESPONSE TO IRRADIATION BY THE ELECTROMAGNETIC ENERGY WITH PREFERENTIAL SENSITIVITY TO THE X-RAY REGION OF THE SPECTRUM OF SAID ENERGY OVER THE VISIBLE REGION THEREOF.
Claim 2
Dependent Claim
82 words
AN X-RAY DETECTOR, COMPRISING A VOLTAGE SOURCE, AN ELECTRIC CIRCUIT OPERATIVELY CONNECTED TO SAID SOURCE, SAID CIRCUIT INCLUDING A SELENIUM ELEMENT IN VITREOUS FORM IN ELECTRICAL SERIES WITH SAID SOURCE, AND MEANS FOR DETECTING CHANGES IN THE ELECTRICAL RESISTANCE OF SAID ELEMENT, SAID VITREOUS FROM SELENIUM BEING CHARACTERIZED BY THE PROPERTY OF VARYING IN ELECTRICAL RESISTANCE IN RESPONSE TO IRRADIATION BY THE ELECTROMAGNETIC ENERGY WITH PREFERENTIAL SENSITIVITY TO THE X-RAY REGION OF THE SPECTRUM OF SAID ENERGY OVER THE VISIBLE REGION THEREOF.
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) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |