Patent US3901703A successfully refreshed from Google Patents.
US3901703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xeroradiographic plate
Assignee: International Standard Electric Corp
•
Filing: 1974-01-23
•
Granted: 1975-08-26
•
Expires: 1994-01-23
Abstract
Abstract A xeroradiographic plate or foil has a non-conducting selenium layer. The X-ray absorption of the selenium layer is improved by additions of elements of high atomic number or chemical compounds of such elements especially lead, thallium and elements of the rare earth group. In a preferred example, the selenium consists of three layers, one layer of pure selenium, a second layer with additions of high atomic number elements and a third layer with an addition of arsenic.
Inventors
- 👤 Helmut Baum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:09
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08207; G03G5/043; G03G5/0433; G03G5/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
A XERORADIOGRAPHIC ELEMENT COMPRISING: AN ALUMINIUM FOIL SUBSTRATE HAVING A TICKNESS OF 0.1 MM, A LAYER OF CONDUCTIVE LACQUER OF POLYVINYLACETAL CONTAINING AN ADDITION OF GRAPHIC ON SAID FOIL SUBSTRATE SAID LAYER OF CONDUCTIVE LACQUER HAVING A THICKNESS OF 0.5 TO 2 MICRONS, A LAYER OF PURE SELENIUM HAVING A THICKNESS OF 1 TO 20 MICRONS ON SAID LAYER OF CONDUCTIVE LACQUER, AN INTERMEDIATE LAYER OF SELENIUM HAVING A LEAD ADDITIVE, SAID INTERMEDIATE LAYER DISPOSED ON SAID PURE SELENIUM LAYER AND HAVING A THICKNESS OF UP TO 30 MICRONS, AND A TOP LAYER OF SELENIUM CONTAINING AN ADDITIVE OF 0.5 PERCENT BY WEIGHT ARSENIC AS A CRYSTALIZATION-RETARDING AGENT SAID TOP LAYER HAVING A THICKNESS OF 2 TO 30 MICRONS.
Claim 2
Dependent Claim
119 words
A XERORADIOGRAPHIC ELEMENT COMPRISING: AN ALUMINIUM FOIL SUBSTRATE HAVING A TICKNESS OF 0.1 MM, A LAYER OF CONDUCTIVE LACQUER OF POLYVINYLACETAL CONTAINING AN ADDITION OF GRAPHIC ON SAID FOIL SUBSTRATE SAID LAYER OF CONDUCTIVE LACQUER HAVING A THICKNESS OF 0.5 TO 2 MICRONS, A LAYER OF PURE SELENIUM HAVING A THICKNESS OF 1 TO 20 MICRONS ON SAID LAYER OF CONDUCTIVE LACQUER, AN INTERMEDIATE LAYER OF SELENIUM HAVING A LEAD ADDITIVE, SAID INTERMEDIATE LAYER DISPOSED ON SAID PURE SELENIUM LAYER AND HAVING A THICKNESS OF UP TO 30 MICRONS, AND A TOP LAYER OF SELENIUM CONTAINING AN ADDITIVE OF 0.5 PERCENT BY WEIGHT ARSENIC AS A CRYSTALIZATION-RETARDING AGENT SAID TOP LAYER HAVING A THICKNESS OF 2 TO 30 MICRONS.
Claim 3
Dependent Claim
88 words
A xeroradiographic element comprising: an aluminum substrate having a thickness of 50 to 200 microns; a layer of pure selenium on said substrate having a thickness of 5 to 50 microns; an intermediate layer of selenium having a lead additive, said intermediate layer disposed on said pure selenium layer and having a thickness of 1 to 50 microns; and a top layer of selenium containing an additive of 0.5 percent by weight arsenic as a crystallization-retarding agent, said top layer having a thickness of 1 to 50 microns.
Claim 4
Dependent Claim
88 words
A xeroradiographic element comprising: an aluminum substrate having a thickness of 50 to 200 microns; a layer of pure selenium on said substrate having a thickness of 5 to 50 microns; an intermediate layer of selenium having a lead additive, said intermediate layer disposed on said pure selenium layer and having a thickness of 1 to 50 microns; and a top layer of selenium containing an additive of 0.5 percent by weight arsenic as a crystallization-retarding agent, said top layer having a thickness of 1 to 50 microns.
References Cited (Backward Citations)
US3427157A
Cited
US3350595A
Cited
US3501343A
Cited
US3655377A
Cited
US3574140A
Cited
US3647427A
Cited
US3709683A
Cited
US3712810A
Cited
US3813243A
Cited
US3794842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |