Patent US2683837A successfully refreshed from Google Patents.
US2683837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron emissive composition and method of application
Assignee: General Electric Co
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Filing: 1951-01-12
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Granted: 1954-07-13
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Expires: 1971-01-12
Abstract
No abstract record available.
Inventors
- 👤 James A Hager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:55
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
IN THE MANUFACTURE OF AN ELECTRIC DISCHARGE DEVICE COMPRISING A SEALED ENVELOPE CONTAINING AN ACTIVATED CATHODE, THE METHOD WHICH COMPRISES PREPARING AN ACTIVATING MIXTURE COMPRISING A SUSPENSION OF FINELY DIVIDED PARTICLES OF ALKALINE EARTH METAL CARBONATE IN A PRIMARY CELLULOSIC BINDER AND ADDING THERETO A SECONDARY BINDER OF GRANULAR THERMO-SETTING RESINOUS COMPOSITION HAVING A VOLATILIZATION TEMPERATURE MATERIALLY ABOVE THAT OT SAID CELLULOSIC BINDER AND IN PROPORTIONS CORRESPONDING APPROXIMATELY TO 2 TO 5 GRAMS OF THE SAID RESINOUS COMPOSITION PER 180 ML. OF SUSPENSION COMPRISING ABOUT 130 TO 220 GRAMS OF ALKALINE EARTH CARBONATE IN ABOUT 130 TO 140 ML. OF CELLULOSIC BINDER SOLUTION HAVING A VISCOSITY OF ABOUT 30 TO 100 CENTIPOISES, APPLYING THE SAID ACTIVATING MIXTURE TO SAID CATHODE, SEALING THE CATHODE INTO THE ENVELOPE BY APPLICATION OF HEAT SUFFICIENT TO VOLATILIZE THE SAID PRIMARY CELLULOSIC BINDER AND TO CONCOMITANTLY CURE THE SAID SECONDARY COMPOSITION TO A SOLID PLASTIC WHICH RETAINS THE SAID CARBONATE IN PLACE
Claim 2
Dependent Claim
157 words
IN THE MANUFACTURE OF AN ELECTRIC DISCHARGE DEVICE COMPRISING A SEALED ENVELOPE CONTAINING AN ACTIVATED CATHODE, THE METHOD WHICH COMPRISES PREPARING AN ACTIVATING MIXTURE COMPRISING A SUSPENSION OF FINELY DIVIDED PARTICLES OF ALKALINE EARTH METAL CARBONATE IN A PRIMARY CELLULOSIC BINDER AND ADDING THERETO A SECONDARY BINDER OF GRANULAR THERMO-SETTING RESINOUS COMPOSITION HAVING A VOLATILIZATION TEMPERATURE MATERIALLY ABOVE THAT OT SAID CELLULOSIC BINDER AND IN PROPORTIONS CORRESPONDING APPROXIMATELY TO 2 TO 5 GRAMS OF THE SAID RESINOUS COMPOSITION PER 180 ML. OF SUSPENSION COMPRISING ABOUT 130 TO 220 GRAMS OF ALKALINE EARTH CARBONATE IN ABOUT 130 TO 140 ML. OF CELLULOSIC BINDER SOLUTION HAVING A VISCOSITY OF ABOUT 30 TO 100 CENTIPOISES, APPLYING THE SAID ACTIVATING MIXTURE TO SAID CATHODE, SEALING THE CATHODE INTO THE ENVELOPE BY APPLICATION OF HEAT SUFFICIENT TO VOLATILIZE THE SAID PRIMARY CELLULOSIC BINDER AND TO CONCOMITANTLY CURE THE SAID SECONDARY COMPOSITION TO A SOLID PLASTIC WHICH RETAINS THE SAID CARBONATE IN PLACE
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) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |