Patent US2836754A successfully refreshed from Google Patents.
US2836754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dark trace cathode-ray tube and method of manufacture
Assignee: White Consolidated Industries Inc
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Filing: 1954-10-06
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Granted: 1958-05-27
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Expires: 1974-10-06
Abstract
No abstract record available.
Inventors
- 👤 Holborn Kate
- 👤 Grove Cedar
- 👤 Hodowanec Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:41
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/14; H01J31/00; H01J31/08; H01J31/49; H01J31/58; H01J31/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
A SCREEN FOR DARK TRACE CATHODE-RAY TUBES, COMPRISING A TRANSPARENT THIN BACKING SUPPORT, A COATING OF SCOTOPHOR MATERIAL ON SAID SUPPORT, AND MEANS TO CONVERT INCIDENT SHORT WAVELENGTH INFRA-RED RADIATION INTO LONG WAVELENGTH INFRA-RED RADIATION FOR RECORD ERASURE, SAID MEANS COMPRISING A LAYER OF AMORPHOUS CARBON, AND A LAYER OF A METAL FROM THE GROUP CONSISTING OF ALUMINUM, BERYLLIUM AND MAGNESIUM THE LAST-MENTIONED LAYER BEING LOCATED BETWEEN THE SCOTOPHOR AND THE FIRST-MENTIONED LAYER.
References Cited (Backward Citations)
US2545200A
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US2665220A
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US2533381A
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US2615821A
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US2616057A
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US2661437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |