Patent US3129153A successfully refreshed from Google Patents.
US3129153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dissolution of copper
Assignee: FMC Corp
•
Filing: 1960-08-23
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Granted: 1964-04-14
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Expires: 1980-08-23
Abstract
No abstract record available.
Inventors
- 👤 Paul H Margulies
- 👤 William J Tillis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:54
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD FOR DISSOLVING COPPER WHICH COMPRISES CONTACTING THE COPPER WITH AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF ABOUT 10 TO ABOUT 45% OF A PERSULFATE WHILE SIMULTANEOUSLY APPLYING AN ELECTRIC POTENTIAL BETWEEN SAID COPPER AND INERT CONDUCTOR, SAID COPPER SERVING AS AN ANODE, SAID PERSULFATE SERVING AS THE ELECTROLYTE, AND SAID INERT CONDUCTOR SERVING AS THE CATHODE, SAID ELECTRIC POTENTIAL BEING ABOVE THE POLARIZING POTENTIAL OF COPPER IN SAID PERSULFATE SOLUTION AND SUFFICIENT TO PERMIT A SUBSTANTIAL CURRENT FLOW THROUGH SAID CELL, BUT BELOW THE DEPOSTION POTENTIAL OF COPPER IN SAID PERSULFATE SOLUTION.
Claim 2
Independent Claim
93 words
A METHOD FOR DISSOLVING COPPER WHICH COMPRISES CONTACTING THE COPPER WITH AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF ABOUT 10 TO ABOUT 45% OF A PERSULFATE WHILE SIMULTANEOUSLY APPLYING AN ELECTRIC POTENTIAL BETWEEN SAID COPPER AND INERT CONDUCTOR, SAID COPPER SERVING AS AN ANODE, SAID PERSULFATE SERVING AS THE ELECTROLYTE, AND SAID INERT CONDUCTOR SERVING AS THE CATHODE, SAID ELECTRIC POTENTIAL BEING ABOVE THE POLARIZING POTENTIAL OF COPPER IN SAID PERSULFATE SOLUTION AND SUFFICIENT TO PERMIT A SUBSTANTIAL CURRENT FLOW THROUGH SAID CELL, BUT BELOW THE DEPOSTION POTENTIAL OF COPPER IN SAID PERSULFATE SOLUTION.
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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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |