Patent US4553273A successfully refreshed from Google Patents.
Patent US2689189A successfully refreshed from Google Patents.
US2689189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray fluorescent screen
Assignee: Westinghouse Electric Corp
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Filing: 1951-12-05
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Granted: 1954-09-14
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Expires: 1971-12-05
Abstract
No abstract record available.
Inventors
- 👤 Walter J Hushley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:37
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J29/385; G; G21; G21K; G21K4/00; Y; Y10; Y10S; Y10S65/00; Y10S65/01; Y10T; Y10T428/00; Y10T428/26; Y10T428/266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A SCREEN COMPRISING A SHEET OF SODA-LIME GLASS FROM 0.005 TO 0.008 INCH THICK HAVING ON ONE SIDE A LAYER CONSISTING ESSENTIALLY OF PHOSPHOR POWDER SLECTED FROM THE GROUP CONSISTING OF ZINC-CADMIUM-SULPHIDE, CADMIUM TUNGSTATE, CALCIUM TUNGSTATE AND BARIUM-LEAD-SULPHATE, BOUND TOGETHER WITH A BINDER SELECTED FROM THE GROUP WHICH CONSISTS OF SODIUM SILICATE, POTASSIUM SILICATE, LITHIUM SILICATE AND ETHYL SILICATE, SAID SHEET HAVING ON ITS OTHER SIDE A TRANSPARENT LAYER OF MATERIAL HAVING A RESISTANCE NOT OVER ONE MEGOHM PER SQUARE AND COATED WITH A PHOTOELECTRIC LAYER.
Claim 2
Dependent Claim
86 words
A SCREEN COMPRISING A SHEET OF SODA-LIME GLASS FROM 0.005 TO 0.008 INCH THICK HAVING ON ONE SIDE A LAYER CONSISTING ESSENTIALLY OF PHOSPHOR POWDER SLECTED FROM THE GROUP CONSISTING OF ZINC-CADMIUM-SULPHIDE, CADMIUM TUNGSTATE, CALCIUM TUNGSTATE AND BARIUM-LEAD-SULPHATE, BOUND TOGETHER WITH A BINDER SELECTED FROM THE GROUP WHICH CONSISTS OF SODIUM SILICATE, POTASSIUM SILICATE, LITHIUM SILICATE AND ETHYL SILICATE, SAID SHEET HAVING ON ITS OTHER SIDE A TRANSPARENT LAYER OF MATERIAL HAVING A RESISTANCE NOT OVER ONE MEGOHM PER SQUARE AND COATED WITH A PHOTOELECTRIC LAYER.
References Cited (Backward Citations)
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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) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |