US3363136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic cathodes
Assignee: Rauland Borg Corp
•
Filing: 1966-03-22
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Granted: 1968-01-09
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Expires: 1986-03-22
Abstract
No abstract record available.
Inventors
- 👤 Pakswer Serge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:14
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/48; H01J29/485; H01J1/00; H01J1/02; H01J1/13; H01J1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A GRID-CATHODE ASSEMBLY FOR A CATHODE-RAY TUBE OR THE LIKE COMPRISING: A TUBULAR METALLIC CATHODE SUBSTRATE HAVING A SINGLE FLAT END FACE; MEANS COMPRISING AN ELECTRICAL HEATING ELEMENT CONTAINED WITHIN SAID TUBULAR SUBSTRATE FOR HEATING SAID END FACE TO A PREDETERMINED TEMPERATURE; A THERMIONICALLY EMISSIVE COATING DEPOSITED ON SAID END FACE, AND HAVING A SMOOTH SURFACE FOR EMITTING ELECTRONS ALONG A PREDETERMINED ELECTRON-DISCHARGE PATH WHEN HEATED TO SAID PREDETERMINED TEMPERATURE; A METALLIC CONTROL ELECTRODE HAVING A FLAT APERTURED FACE; AND MEANS, COMPRISING A UNIFORM AND CONTINUOUS ELECTRONTRANSPARENT ELECTRICALLY INSULATING LAYER INTERPOSED IN SAID ELECTRON-DISCHARGE PATH BETWEEN AND IN CONTACT WITH BOTH SAID EMISSIVE COATING AND SAID APERTURED FACE AND CHEMICALLY INERT WITH RESPECT TO BOTH SAID COATING AND ELECTRODE FACE AT SAID PREDETERMINED TEMPERATURE, FOR DETERMINING THE SPACING THEREBETWEEN.
Claim 2
Dependent Claim
129 words
A GRID-CATHODE ASSEMBLY FOR A CATHODE-RAY TUBE OR THE LIKE COMPRISING: A TUBULAR METALLIC CATHODE SUBSTRATE HAVING A SINGLE FLAT END FACE; MEANS COMPRISING AN ELECTRICAL HEATING ELEMENT CONTAINED WITHIN SAID TUBULAR SUBSTRATE FOR HEATING SAID END FACE TO A PREDETERMINED TEMPERATURE; A THERMIONICALLY EMISSIVE COATING DEPOSITED ON SAID END FACE, AND HAVING A SMOOTH SURFACE FOR EMITTING ELECTRONS ALONG A PREDETERMINED ELECTRON-DISCHARGE PATH WHEN HEATED TO SAID PREDETERMINED TEMPERATURE; A METALLIC CONTROL ELECTRODE HAVING A FLAT APERTURED FACE; AND MEANS, COMPRISING A UNIFORM AND CONTINUOUS ELECTRONTRANSPARENT ELECTRICALLY INSULATING LAYER INTERPOSED IN SAID ELECTRON-DISCHARGE PATH BETWEEN AND IN CONTACT WITH BOTH SAID EMISSIVE COATING AND SAID APERTURED FACE AND CHEMICALLY INERT WITH RESPECT TO BOTH SAID COATING AND ELECTRODE FACE AT SAID PREDETERMINED TEMPERATURE, FOR DETERMINING THE SPACING THEREBETWEEN.
References Cited (Backward Citations)
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US1837566A
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US2236289A
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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) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |