US3814673A
Expired / Lapsed
US
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Process for tantalliding and niobiding base metal compositions
Assignee: GANNON UNIVERSITY ERIE
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Filing: 1971-10-15
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Granted: 1974-06-04
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Expires: 1991-10-15
Abstract
Abstract A TANTALLIDE OR NIOBIDE COATING IS FORMED ON SPECIFIED BASE METAL COMPOSITIONS BY MAKING THE BASE METAL THE CATHODE JOINED THROUGH AM EXTERNAL ELECTRICAL CIRCUIT TO A TANTAUM OR NIOBIUM ANODE IN AN ELECTRIC CELL HAVING A SPECIFIED FUSED SALT ELECTROLYTE AT A TEMPERATURE OF AT LEAST 900*C., BUT BELOW THE MLETING POINT OF THE METAL COMPOSITION. SUCH A COMBINATION IS A SELF-GENERATING CELL PRODUCING ELECTRIC BUT AN EXTERNAL E.M.F. MAY BE IMPRESSED PROVIDING THE CURRENT DENSITY DOES NOT EXCEED 10 EMPERS/CM.2. THE PROCESS IS USEFUL IN MAKING TIGHT ADHERENT COATINGS COMPOSED OF TANTALUM OR NIOBIUM AND THE BASE METAL ON THE SURFACE OF THE SUBSTRATE.
Inventors
- 👤 N Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:36
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/54; C25; C25D; C25D3/00; C25D3/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |