Patent US3269804A successfully refreshed from Google Patents.
US3269804A
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Dispenser cathode and method for the production thereof
Assignee: General Electric Co
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Filing: 1963-11-01
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Granted: 1966-08-30
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Expires: 1983-11-01
Abstract
No abstract record available.
Inventors
- 👤 Iii John H Affleck
- 👤 James J Paley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:03
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/28; H01J9/00; H01J9/02; H01J9/04; H01J9/042; H01J9/047
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
67 words
AN INTEGRAL COHESIVE THERMIONIC DISPENSER CATHODE COMPRISING A HOT PRESSED FUSED MIXTURE OF (A) AT LEAST ABOUT 8 WEIGHT PERCENT BA2SIO4, (B) LESS THAN ABOUT 1 WEIGHT PERCENT CACO3, (C) THE BALANCE OF SAID CATHODE BEING A REFRACTORY METAL AS A POROUS MATRIX WHICH CONSTITUTES A SUBSTANTIAL MAJOR PROPORTION OF THE WEIGHT OF SAID CATHODE, (D) SAID BA2SIO4 AND CACO3 BEING DISPERSED THROUGHOUT THE REFRACTORY METAL MATRIX.
Claim 2
Dependent Claim
67 words
AN INTEGRAL COHESIVE THERMIONIC DISPENSER CATHODE COMPRISING A HOT PRESSED FUSED MIXTURE OF (A) AT LEAST ABOUT 8 WEIGHT PERCENT BA2SIO4, (B) LESS THAN ABOUT 1 WEIGHT PERCENT CACO3, (C) THE BALANCE OF SAID CATHODE BEING A REFRACTORY METAL AS A POROUS MATRIX WHICH CONSTITUTES A SUBSTANTIAL MAJOR PROPORTION OF THE WEIGHT OF SAID CATHODE, (D) SAID BA2SIO4 AND CACO3 BEING DISPERSED THROUGHOUT THE REFRACTORY METAL MATRIX.
Claim 3
Independent Claim
73 words
A METHOD OF PRODUCING A THERMIONIC DISPENSER CATHODE COMPRISING IN COMBINATION (A) INTIMATELY MIXING A REFRACTORY METAL, A BARIUM COMPOUND, AND LESS THAN ABOUT 1.0 WEIGHT PERCENT, CACO3, (B) PROVIDING A REDUCING ATMOSPHERE IN A HEATING AND PRESSING APPARATUS, (C) COMPRESSING SAID MIXTURE TO ABOVE SAID 800-2000 POUNDS PER SQUARE INCH, AND (D) SIMULTANEOUSLY HEATING SAID MIXTURE IN THE RANGE OF ABOUT 1000* TO 2000*C. TO PROVIDE A SINTERED COHESIVE INTEGRAL THERMIONIC DISPENSER.
Claim 4
Independent Claim
73 words
A METHOD OF PRODUCING A THERMIONIC DISPENSER CATHODE COMPRISING IN COMBINATION (A) INTIMATELY MIXING A REFRACTORY METAL, A BARIUM COMPOUND, AND LESS THAN ABOUT 1.0 WEIGHT PERCENT, CACO3, (B) PROVIDING A REDUCING ATMOSPHERE IN A HEATING AND PRESSING APPARATUS, (C) COMPRESSING SAID MIXTURE TO ABOVE SAID 800-2000 POUNDS PER SQUARE INCH, AND (D) SIMULTANEOUSLY HEATING SAID MIXTURE IN THE RANGE OF ABOUT 1000* TO 2000*C. TO PROVIDE A SINTERED COHESIVE INTEGRAL THERMIONIC DISPENSER.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |