US2583100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of a metallic cathode to receive electrodeposited metal
Assignee: Union Carbide Corp
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Filing: 1947-03-25
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Granted: 1952-01-22
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Expires: 1967-03-25
Abstract
No abstract record available.
Inventors
- 👤 Howard R Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:27
CPC Classifications
C; C25; C25C; C25C7/00; C25C7/06; C25C7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN THE ART OF WINNING IRON FROM AN AQUEOUS SOLUTION OF AN IRON SALT BY THE ELECTRODEPOSITION OF THE IRON FROM THE SALT ONTO AN IRON CATHODE, THE METHOD OF CONDITIONING THE CATHODE PRIOR TO DEPOSITION OF THE IRON WHICH COMPRISES SUBJECTING THE CATHODE TO THE ACTION OF AQUEOUS NITRIC ACID ONLY UNTIL BROWN FUMES APPEAR FROM THE CATHODE SURFACE AND THE SURFACE IS GIVEN AN EVENLY ETCHED MATTE FINISH AND PRESENTS A DARK FILM, AND THEN PREVENTING FURTHER ACTION OF THE ACID, THE SURFACE BEING FREE OF SUCH DISTINCT CRYSTALLINE ETCH AS TO BE VISIBLE TO THE NAKED EYE AND THE AMOUNT OF TREATMENT CORRESPONDING TO THE IMMERSION OF THE CATHODE IN AN AQUEOUS 5% TO 15% NITRIC ACID SOLUTION FOR FROM 10 TO 25 SECONDS.
Claim 2
Dependent Claim
127 words
IN THE ART OF WINNING IRON FROM AN AQUEOUS SOLUTION OF AN IRON SALT BY THE ELECTRODEPOSITION OF THE IRON FROM THE SALT ONTO AN IRON CATHODE, THE METHOD OF CONDITIONING THE CATHODE PRIOR TO DEPOSITION OF THE IRON WHICH COMPRISES SUBJECTING THE CATHODE TO THE ACTION OF AQUEOUS NITRIC ACID ONLY UNTIL BROWN FUMES APPEAR FROM THE CATHODE SURFACE AND THE SURFACE IS GIVEN AN EVENLY ETCHED MATTE FINISH AND PRESENTS A DARK FILM, AND THEN PREVENTING FURTHER ACTION OF THE ACID, THE SURFACE BEING FREE OF SUCH DISTINCT CRYSTALLINE ETCH AS TO BE VISIBLE TO THE NAKED EYE AND THE AMOUNT OF TREATMENT CORRESPONDING TO THE IMMERSION OF THE CATHODE IN AN AQUEOUS 5% TO 15% NITRIC ACID SOLUTION FOR FROM 10 TO 25 SECONDS.
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Cited
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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) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |