Patent US3148629A successfully refreshed from Google Patents.
Patent US3262870A successfully refreshed from Google Patents.
US3262870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the extraction of copper
Assignee: Powdered Metals Corp
•
Filing: 1961-08-31
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Granted: 1966-07-26
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Expires: 1981-08-31
Abstract
No abstract record available.
Inventors
- 👤 George E Harlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:18
CPC Classifications
C; C25; C25C; C25C5/00; C25C5/02; B; B62; B62K; B62K21/00; B62K21/12; B62K21/16; C22; C22B; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR ELECTRODEPOSITING COPPER POWDER COMPRISING: INTRODUCING AN ELECTROLYTE INTO AN ELECTROLYTIC CELL; SAID ELECTROLYTE BEING AN H2SO4-WATER SOLUTION CONTANING DISSOLVED COPPER; SAID ELECTROLYTIC CELL HAVING CATHODES FORMED OF SUBSTANTIALLY PURE NICKEL AND ANODES FORMED OF A LEAD-ANTIMONY ALLOY; ELECTROLYZING SAID CELL TO DEPOSIT COPPER POWDER FROM SAID ELECTROLYTE; SAID CELL BEING MAINTAINED UNDER THE FOLLOWING CONDITIONS THROUGHOUTSIDE ELECTROLYSIS: (1) VOLTAGE BETWEEN ELECTRODE PAIRS: AT LEAST APPROXIMATELY 61/4 VOLTS (2) CATHODE CURRENT DENSITY PER CATHODE SIDE: AT LEAST APPROXIMATELY 125 AMPS./FT2; AND REMOVING SAID COPPER POWDER FROM SAID ELECTROLYTE AND ELECTROLYTIC CELL.
Claim 2
Dependent Claim
93 words
A PROCESS FOR ELECTRODEPOSITING COPPER POWDER COMPRISING: INTRODUCING AN ELECTROLYTE INTO AN ELECTROLYTIC CELL; SAID ELECTROLYTE BEING AN H2SO4-WATER SOLUTION CONTANING DISSOLVED COPPER; SAID ELECTROLYTIC CELL HAVING CATHODES FORMED OF SUBSTANTIALLY PURE NICKEL AND ANODES FORMED OF A LEAD-ANTIMONY ALLOY; ELECTROLYZING SAID CELL TO DEPOSIT COPPER POWDER FROM SAID ELECTROLYTE; SAID CELL BEING MAINTAINED UNDER THE FOLLOWING CONDITIONS THROUGHOUTSIDE ELECTROLYSIS: (1) VOLTAGE BETWEEN ELECTRODE PAIRS: AT LEAST APPROXIMATELY 61/4 VOLTS (2) CATHODE CURRENT DENSITY PER CATHODE SIDE: AT LEAST APPROXIMATELY 125 AMPS./FT2; AND REMOVING SAID COPPER POWDER FROM SAID ELECTROLYTE AND ELECTROLYTIC CELL.
References Cited (Backward Citations)
US890887A
Cited
US1340826A
Cited
US1580614A
Cited
US1862343A
Cited
US1777371A
Cited
US1968490A
Cited
US2121887A
Cited
US2182567A
Cited
US2285549A
Cited
US2180961A
Cited
US2356897A
Cited
US2854737A
Cited
US2579551A
Cited
US2625507A
Cited
US2564823A
Cited
GB668470A
Cited
US2825690A
Cited
US2710253A
Cited
US2816023A
Cited
US2792342A
Cited
US2944957A
Cited
US2970096A
Cited
US2972573A
Cited
US3030282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |