Patent US2942130A successfully refreshed from Google Patents.
US2942130A
Expired / Lapsed
US
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Aperture mask coating to prevent cathode poisoning
Assignee: Corning Glass Works
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Filing: 1958-12-12
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Granted: 1960-06-21
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Expires: 1978-12-12
Abstract
No abstract record available.
Inventors
- 👤 John L Sheldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:33
CPC Classifications
D; D01; D01H; D01H7/00; D01H7/02; D01H7/52; D01H7/60; D01H7/604; H; H01; H01J; H01J29/00; H01J29/02; H01J29/06; H01J29/07; H01J29/10; H01J29/18; H01J29/34; H01J2209/00; H01J2209/38; H01J2209/385; H01J2229/00; H01J2229/07; H01J2229/0727; H01J2229/0777
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
AN ELECTRON ABSORBING MASK FOR USE IN A CATHODE RAY TUBE OPERATING AT A PREDETERMINED VOLTAGE DROP WHICH COMPRISES A GLASS SHEET THAT EVOLVES A CATHODE POISONING AGENT WHEN SUBJECTED TO ELECTRON BOMBARDMENT, AN ELECTRON ABSORBING COATING ON THE ELECTRON INTERCEPTING SURFACE OF THE GLASS SHEET THAT CONSISTS OF A CHEMICALLY INERT METAL AND HAS AN ELECTRON ABSORBING POWER CORRESPONDING TO THAT OF AN ALUMINUM COATING ON THE ORDER OF AT LEAST 75,000 ANGSTROM UNITS IN THICKNESS, AND A PATTERN OF PERFORATIONS FORMED THROUGH THE METAL COATED GLASS SHEET TO PERMIT SELECTIVE TRANSMISSION OF ELECTRONS.
Claim 2
Dependent Claim
95 words
AN ELECTRON ABSORBING MASK FOR USE IN A CATHODE RAY TUBE OPERATING AT A PREDETERMINED VOLTAGE DROP WHICH COMPRISES A GLASS SHEET THAT EVOLVES A CATHODE POISONING AGENT WHEN SUBJECTED TO ELECTRON BOMBARDMENT, AN ELECTRON ABSORBING COATING ON THE ELECTRON INTERCEPTING SURFACE OF THE GLASS SHEET THAT CONSISTS OF A CHEMICALLY INERT METAL AND HAS AN ELECTRON ABSORBING POWER CORRESPONDING TO THAT OF AN ALUMINUM COATING ON THE ORDER OF AT LEAST 75,000 ANGSTROM UNITS IN THICKNESS, AND A PATTERN OF PERFORATIONS FORMED THROUGH THE METAL COATED GLASS SHEET TO PERMIT SELECTIVE TRANSMISSION OF ELECTRONS.
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) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |