Carbon or graphite formed body
Abstract
Abstract THIS INVENTION RELATES TO A CARBON OR GRAPHITE FORMED BODY, AND MORE PARTICULARLY AN ARC ELECTRODE HAVING A PROTECTIVE LAYER WHICH ARRESTS OXIDATION, AND WHICH INCLUDES A PRIMARY LAYER, APPLIED UPON A CARBON OR GRAPHIC FORMED BODY, AND A METALLIC COVER LAYER COMPRISED ESSENTIALLY OF ALUMINUM OVER THE PRIMARY LAYER. THE PRIMARY LAYER IS COMPRISED OF 90 TO 100%, PREFERABLY 95 TO 98.9%, OF SILCON AND 0 TO 10%, PREFERABLY 1.1 TO 5.0%, OF SODIUM, MAGNESIUM, CALCIUM, BORON, ALUMINUM, TITANIUM, ZIRCONIUM, MANGANESE, IRON, CARBON, NITROGEN PHOSPHORUS AND OXYGEN, SEPARATELY OR IN COMBINATION. THE COVER LAYER IS COMPRISED OF 85 TO 100%, PREFERABLY 93 TO 99.5%, ALUMINUM AND 0 TO 15%, PREFERABLY 0.5 TO 7%, SODIUM, MAGNESIUM, BORON, SILICON, PHOSPHORUS, OXYGEN, COPPER, ZINC, LEAD, TITANIUM, ZIRCONIUM, CHROMIUM, MANGANESE, IRON, COBALT AND NICKEL, SEPARATELY OR IN COMBINATION.
Inventors
- 👤 Ottmar Rubisch
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |