Patent US4199540A successfully refreshed from Google Patents.
Patent US2899299A successfully refreshed from Google Patents.
US2899299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing sintered
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:20
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A METHOD OF FORMING A CATHODE ELEMENT COMPRISING MIXING NICKEL POWDER WITH A POWDER MATERIAL SELECTED FROM THE GROUP CONSISTING OF BARIUM CARBONATE, BARIUMSTRONTIUM CARBONATE AND BARIUM-STRONTIUM-CALCIUM CARBONATE TOGETHER WITH AN ACTIVATOR MATERIAL, MOLDING THE RESULTANT MIXTURE UNDER PRESSURE, HEATING TO A FIRST TEMPERATURE IN THE RANGE OF FROM 550*C. TO 650*C. IN A NONOXIDIZING ATMOSPHERE, THE HEATING IN THE RANGE OF FROM ABOUT 400*C. TO THE SAID FIRST TEMPERATURE BEING CARRIED OUT IN A REDUCING ATMOSPHERE, FURTHER INCREASING THE TEMPERATURE OF THE PRESSED MIXTURE ABOVE 650*C. AND THEN DECREASING TO A SECOND TEMPERATURE IN THE RANGE OF FROM 550*C. TO 650*C., WHICH SECOND TEMPERATURE MAY BE THE SAME AS THE SAID FIRST TEMPERATURE, THE LAST HEATING AND COOLING STEPS BEING CARRIED OUT IN AN ATMOSPHERE OF AN INERT GAS, FOLLOWED BY FURTHER DECREASING THE TEMPERATURE OF THE PRESSED MIXTURE FROM THE SAID SECOND TEMPERATURE TO ABOUT 400*C. IN A REDUCING ATMOSPHERE, AND FINALLY DECREASING THE TEMPERATURE BELOW ABOUT 400* C. IN A NON-OXIDIZING ATMOSPHERE.
Claim 2
Independent Claim
165 words
A METHOD OF FORMING A CATHODE ELEMENT COMPRISING MIXING NICKEL POWDER WITH A POWDER MATERIAL SELECTED FROM THE GROUP CONSISTING OF BARIUM CARBONATE, BARIUMSTRONTIUM CARBONATE AND BARIUM-STRONTIUM-CALCIUM CARBONATE TOGETHER WITH AN ACTIVATOR MATERIAL, MOLDING THE RESULTANT MIXTURE UNDER PRESSURE, HEATING TO A FIRST TEMPERATURE IN THE RANGE OF FROM 550*C. TO 650*C. IN A NONOXIDIZING ATMOSPHERE, THE HEATING IN THE RANGE OF FROM ABOUT 400*C. TO THE SAID FIRST TEMPERATURE BEING CARRIED OUT IN A REDUCING ATMOSPHERE, FURTHER INCREASING THE TEMPERATURE OF THE PRESSED MIXTURE ABOVE 650*C. AND THEN DECREASING TO A SECOND TEMPERATURE IN THE RANGE OF FROM 550*C. TO 650*C., WHICH SECOND TEMPERATURE MAY BE THE SAME AS THE SAID FIRST TEMPERATURE, THE LAST HEATING AND COOLING STEPS BEING CARRIED OUT IN AN ATMOSPHERE OF AN INERT GAS, FOLLOWED BY FURTHER DECREASING THE TEMPERATURE OF THE PRESSED MIXTURE FROM THE SAID SECOND TEMPERATURE TO ABOUT 400*C. IN A REDUCING ATMOSPHERE, AND FINALLY DECREASING THE TEMPERATURE BELOW ABOUT 400* C. IN A NON-OXIDIZING ATMOSPHERE.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |