US3232853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion resistant chromide coating
Assignee: General Electric Co
•
Filing: 1965-04-26
•
Granted: 1966-02-01
•
Expires: 1985-04-26
Abstract
No abstract record available.
Inventors
- 👤 Newell C Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:16
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/66; C23; C23C; C23C18/00; C23C18/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
A METHOD OF FORMING A CHROMIDE COATING ON A METAL COMPOSITION HAVING A METAL MELTING POINT OF AT LEAST 700* C., AT LEAST 50 MOLE PERCENT OF SAID METAL COMPOSITION BEING AT LEAST ONE OF THE METALS SELECTED FROM THE GROUP OF METALS WHOSE ATOMIC NUMBERS ARE 26-29, 42, 44-47, AND 74-79, SAID METHOD COMPRISING (1) FORMING AN ELECTRIC CELL CONTAINING SAID METAL COMPOSITION AS THE CATHODE JOINED THROUGH AN EXTERNAL ELECTRICAL CIRCUIT TO A CHROMIUM ANODE AND A FUSED SALT ELECTROLYTE COMPOSED ESSENTIALLY OF AT LEAST ONE METAL FLORIDE AND FROM 0.1 TO 50 MOLE PERCENT OF AT LEAST ONE METAL CHROMOUS FLUORIDE, THE METAL OF THE METAL FLUORIDE AND METAL CHROMOUS FLUORIDE BEING AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND ALKALINE EARTH METALS, SAID ELECTROLYATE BEING MAINTAINED AT A TEMPERATURE OF AT LEAST 700* C., BUT BELOW THE FLOW TEMPERATURE OF SAID METAL COMPOSITION, IN THE SUBSTANTIAL ABSENCE OF OXYGEN, (2) CONTROLLING THE CURRENT FLOWING IN SAID ELECTRIC CELL SO THAT THE CURRENT DENSITY OF THE CATHODE DOES NOT EXCESS SUBSTANTIALLY TEN AMPERES PER SQUARE DECIMETER DURING THE FORMATION OF THE CHROMIDE COATING, AND (3) INTERRUPTING THE FLOW OF ELECTRICAL CURRENT AFTER THE DESIRED THICKNESS OF THE CHROMIDE COATING IS FORMED ON THE METAL OBJECT.
Claim 2
Independent Claim
213 words
A METHOD OF FORMING A CHROMIDE COATING ON A METAL COMPOSITION HAVING A METAL MELTING POINT OF AT LEAST 700* C., AT LEAST 50 MOLE PERCENT OF SAID METAL COMPOSITION BEING AT LEAST ONE OF THE METALS SELECTED FROM THE GROUP OF METALS WHOSE ATOMIC NUMBERS ARE 26-29, 42, 44-47, AND 74-79, SAID METHOD COMPRISING (1) FORMING AN ELECTRIC CELL CONTAINING SAID METAL COMPOSITION AS THE CATHODE JOINED THROUGH AN EXTERNAL ELECTRICAL CIRCUIT TO A CHROMIUM ANODE AND A FUSED SALT ELECTROLYTE COMPOSED ESSENTIALLY OF AT LEAST ONE METAL FLORIDE AND FROM 0.1 TO 50 MOLE PERCENT OF AT LEAST ONE METAL CHROMOUS FLUORIDE, THE METAL OF THE METAL FLUORIDE AND METAL CHROMOUS FLUORIDE BEING AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS AND ALKALINE EARTH METALS, SAID ELECTROLYATE BEING MAINTAINED AT A TEMPERATURE OF AT LEAST 700* C., BUT BELOW THE FLOW TEMPERATURE OF SAID METAL COMPOSITION, IN THE SUBSTANTIAL ABSENCE OF OXYGEN, (2) CONTROLLING THE CURRENT FLOWING IN SAID ELECTRIC CELL SO THAT THE CURRENT DENSITY OF THE CATHODE DOES NOT EXCESS SUBSTANTIALLY TEN AMPERES PER SQUARE DECIMETER DURING THE FORMATION OF THE CHROMIDE COATING, AND (3) INTERRUPTING THE FLOW OF ELECTRICAL CURRENT AFTER THE DESIRED THICKNESS OF THE CHROMIDE COATING IS FORMED ON THE METAL OBJECT.
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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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |