US3338809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning ferrous metal strands electrolytically, including moving said strands in a horizontal plane through an electrolyte while under the influence of alternating electrical fields
Assignee: United States Steel Corp
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Filing: 1966-06-23
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Granted: 1967-08-29
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Expires: 1986-06-23
Abstract
No abstract record available.
Inventors
- 👤 Charles D Stricker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:39
CPC Classifications
C; C25; C25F; C25F7/00; C25D; C25D9/00; C25D9/04; C25D9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A METHOD OF ELECTROLYTICALLY CLEANING A STRAND OF AN ELECTRICALLY CONDUCTIVE FERROUS METAL COMPOSITION COMPRISING PASSING SAID STRAND AT A SPEED SUFFICIENT TO MINIMIZE HYDROGEN EMBRITTLEMENT IN A HORIZONTAL PLANE THROUGH SULFURIC ACID ELECTROLYTE HAVING AN ACID CONCENTRATION OF 12 TO 30% BY WEIGHT IN A PROCESSING ZONE DIVIDED INTO A PLURALITY OF ELECTROLYTIC CHAMBERS, PASSING DIRECT CURRENT AT A CURRENT DENSITY OF 40 TO 50 AMPS/IN.2 OF STRAND SURFACE BETWEEN ELECTRODES IN ADJACENT CHAMBERS THROUGH SAID ELECTROLYTE AND SAID STRAND DURING TRAVEL OF SAID STRAND THROUGH SAID CHAMBERS IN SAID PROCESSING ZONE, REVERSING THE CURRENT FLOW IN EACH SUCCEEDING ADJACENT CHAMBER SO AS TO CHANGE THE POLARITY OF SAID STRAND IN EACH OF SAID ADJACENT CHAMBERS THEREBY SUBJECTING SAID STRAND TO ALTERNATING POLARITIES, MAINTAINING THE TEMPERATURE OF SAID ELECTROLYTE AT ABOUT 80 TO 160*F. AND WITHDRAWING SAID STRAND IN A HORIZONTAL PLANE FROM THE LAST OF SAID CHAMBERS IN SAID PROCESSING ZONE.
Claim 2
Independent Claim
153 words
A METHOD OF ELECTROLYTICALLY CLEANING A STRAND OF AN ELECTRICALLY CONDUCTIVE FERROUS METAL COMPOSITION COMPRISING PASSING SAID STRAND AT A SPEED SUFFICIENT TO MINIMIZE HYDROGEN EMBRITTLEMENT IN A HORIZONTAL PLANE THROUGH SULFURIC ACID ELECTROLYTE HAVING AN ACID CONCENTRATION OF 12 TO 30% BY WEIGHT IN A PROCESSING ZONE DIVIDED INTO A PLURALITY OF ELECTROLYTIC CHAMBERS, PASSING DIRECT CURRENT AT A CURRENT DENSITY OF 40 TO 50 AMPS/IN.2 OF STRAND SURFACE BETWEEN ELECTRODES IN ADJACENT CHAMBERS THROUGH SAID ELECTROLYTE AND SAID STRAND DURING TRAVEL OF SAID STRAND THROUGH SAID CHAMBERS IN SAID PROCESSING ZONE, REVERSING THE CURRENT FLOW IN EACH SUCCEEDING ADJACENT CHAMBER SO AS TO CHANGE THE POLARITY OF SAID STRAND IN EACH OF SAID ADJACENT CHAMBERS THEREBY SUBJECTING SAID STRAND TO ALTERNATING POLARITIES, MAINTAINING THE TEMPERATURE OF SAID ELECTROLYTE AT ABOUT 80 TO 160*F. AND WITHDRAWING SAID STRAND IN A HORIZONTAL PLANE FROM THE LAST OF SAID CHAMBERS IN SAID PROCESSING ZONE.
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) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |