Patent US3323914A successfully refreshed from Google Patents.
US3323914A
Expired / Lapsed
US
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Production of tantalum anodes
Assignee: National Research Corp
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Filing: 1964-08-18
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Granted: 1967-06-06
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Expires: 1984-08-18
Abstract
No abstract record available.
Inventors
- 👤 Christopher J B Fincham
- 👤 Gerard J Villani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:52
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/048; H01G9/052; C; C22; C22B; C22B34/00; C22B34/20; C22B34/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE PROCESS OF FORMING A TANTALUM ANODE WHICH COMPRISES THE STEPS OF INTIMATELY MIXING POWERS OF TA2/5 AND C, THE AMOUNT OF CARBON BEING ABOUT 96 TO 99% BY WEIGHT OF THE STOLCHOMETRIC AMOUNT OF CARBON NECESSARY TO COMPLETELY REDUCE THE TA2O5 TO TANTALUM METAL, THE CARBON HAVING AN AVERAGE PARTICLE SIZE LESS THAN 3 MICRONS, THE TA2O5 POWDER AVERAGE PARTICLE SIZE BEING BETWEEN 2 AND 15 MICRONS, COMPRESSING THE MIXED POWDER TO A GREEN ANODE AND FIRING THE ANODE UNDER VACUUM TO A TEMPERATURE OF ABOUT 2000*C. TO PRODUCE AN ANODE OF HIGH CAPACITANCE PER UNIT VOLUME.
Claim 2
Dependent Claim
98 words
THE PROCESS OF FORMING A TANTALUM ANODE WHICH COMPRISES THE STEPS OF INTIMATELY MIXING POWERS OF TA2/5 AND C, THE AMOUNT OF CARBON BEING ABOUT 96 TO 99% BY WEIGHT OF THE STOLCHOMETRIC AMOUNT OF CARBON NECESSARY TO COMPLETELY REDUCE THE TA2O5 TO TANTALUM METAL, THE CARBON HAVING AN AVERAGE PARTICLE SIZE LESS THAN 3 MICRONS, THE TA2O5 POWDER AVERAGE PARTICLE SIZE BEING BETWEEN 2 AND 15 MICRONS, COMPRESSING THE MIXED POWDER TO A GREEN ANODE AND FIRING THE ANODE UNDER VACUUM TO A TEMPERATURE OF ABOUT 2000*C. TO PRODUCE AN ANODE OF HIGH CAPACITANCE PER UNIT VOLUME.
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) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |