US2559263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electropolishing of metals
Assignee: R Wallace & Sons Manufacturing Co
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Filing: 1947-05-15
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Granted: 1951-07-03
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Expires: 1967-05-15
Abstract
No abstract record available.
Inventors
- 👤 Smith Henry Boynton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:43
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
IN THE ANODIC POLISHING OF A METAL OF THE GROUP CONSISTING OF COPPER, BRASS AND ELECTRICALLY DEPOSITED SILVER IN A CYANIDE BATH, THE METHOD WHICH COMPRISES IMMERSING THE METAL IN SAID BATH AND SUBJECTING THE METAL IN THE BATH TO THE ELECTROLYTIC POLISHING ACTION RESULTING FROM THE INTERMITTENT APPLICATION OF A POSITIVE POTENTIAL OF VARYING VALUE TO SAID METAL, AS THE ANODE, AND TO A COMPANION CATHODE, SAID VARYING POTENTIAL BEING COMPOSED OF A DIRECT CURRENT POTENTIAL IN SERIES WITH AN ALTERNATING CURRENT POTENTIAL AND APPLIED FOR A PLURALITY OF TIME-SPACED PERIODS BETWEEN ABOUT 0.5 SECONDS AND ABOUT 0.9 SECOND EACH WITH INTERVENING PERIODS OF AT LEAST ABOUT 0.6 SECOND EACH, THE PEAK ALTERNATING CURRENT POTENTIAL BEING NOT GREATER THAN THE DIRECT CURRENT POTENTIAL.
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) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |