Patent US5277435A successfully refreshed from Google Patents.
US3672990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of electrodes
Assignee: BASF SE
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Filing: 1970-03-25
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Granted: 1972-06-27
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Expires: 1990-03-25
Abstract
Abstract LAYERS OF AN OXIDE MIXTURE OF AT LEAST ONE PLATINUM METAL AND OXIDES OF THE ELEMENTS SILICON, TIN OR GERMANIUM ARE APPLIED TO A CORE OF AN ANODICALLYS TABLE MATERIAL FOR THE PRODUCTION OF ACTIVATED ELECTRODES. FOR THIS PURPOSE, SILICON, TIN OR GERMANIUM OR A COMPOUND THEREOF WITH THE PLATINUM METAL OR A COMPOUND THEREOF IS CONVERTED INTO OXIDIC COMPOUNDS AND THESE ARE FIXED ONTO THE SURFACE OF THE ANODICALLY STABLE MATERIAL OBY THERMAL TREATMENT.
Inventors
- 👤 Fritz Beck
- 👤 Gotthard Csizi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:56
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |