US2978301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for the dissolution of copper
Assignee: FMC Corp
•
Filing: 1957-01-11
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Granted: 1961-04-04
•
Expires: 1977-01-11
Abstract
No abstract record available.
Inventors
- 👤 Paul H Margulies
- 👤 James E Kressbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:41
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
METHOD OF DISSOLVING METALLIC COPPER, COMPRISING CONTACTING THE COPPER WITH AN AQUEOUS SOLUTION CONTAINING AS SOLUTES THEREIN, ABOUT 10% TO 45% OF A PERSULFATE AND A CATALYTIC AMOUNT OF IONS OF A METAL HAVING AN ELECTRODE POTENTIAL MORE NEGATIVE THAN THE ELECTRODE POTENTIAL OF COPPER.
Claim 2
Dependent Claim
45 words
METHOD OF DISSOLVING METALLIC COPPER, COMPRISING CONTACTING THE COPPER WITH AN AQUEOUS SOLUTION CONTAINING AS SOLUTES THEREIN, ABOUT 10% TO 45% OF A PERSULFATE AND A CATALYTIC AMOUNT OF IONS OF A METAL HAVING AN ELECTRODE POTENTIAL MORE NEGATIVE THAN THE ELECTRODE POTENTIAL OF COPPER.
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) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |