Patent US4276758A successfully refreshed from Google Patents.
Patent US2529237A successfully refreshed from Google Patents.
US2529237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-recovery of metals
Assignee: NL Industries Inc
•
Filing: 1945-01-13
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Granted: 1950-11-07
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Expires: 1965-01-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Turner
- 👤 Hugh V Alessandroni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:14
CPC Classifications
C; C25; C25C; C25C5/00; C25C5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD FOR THE PREPARATION OF METALLIC POWDERS WHICH COMPRISES ELECTROLYTICALLY DEPOSITING A BRITTLE METAL UPON A THIN, RESILIENT AND ELASTIC, OPEN-WORK PATTERN COMPOSED OF AN ELECTRICALLY CONDUCTIVE METAL, IN WHICH THE TOTAL OF THE PROJECTED AREAS OF THE OPENINGS CONSTITUTES FROM 15% TO 90% OF THE PROJECTED AREA OF THE PATTERN, SAID OPENINGS NOT EXCEEDING 0.5 INCH IN WIDTH, UNTIL THE METAL DEPOSITED UPON THE PATTERN HAS COMPLETELY FILLED THE OPENINGS IN THE PATTERN AND HAS FORMED A SUBSTANTIALLY HOMOGENEOUS SLAB HAVING THE PATTERN EMBEDDED THEREIN SUBSTANTIALLY MIDWAY BETWEEN ITS MAJOR SURFACES, AND THEN PULVERIZING THE METAL DEPOSIT AND PATTERN WITHOUT PRIOR SEPARATION.
Claim 2
Independent Claim
104 words
A METHOD FOR THE PREPARATION OF METALLIC POWDERS WHICH COMPRISES ELECTROLYTICALLY DEPOSITING A BRITTLE METAL UPON A THIN, RESILIENT AND ELASTIC, OPEN-WORK PATTERN COMPOSED OF AN ELECTRICALLY CONDUCTIVE METAL, IN WHICH THE TOTAL OF THE PROJECTED AREAS OF THE OPENINGS CONSTITUTES FROM 15% TO 90% OF THE PROJECTED AREA OF THE PATTERN, SAID OPENINGS NOT EXCEEDING 0.5 INCH IN WIDTH, UNTIL THE METAL DEPOSITED UPON THE PATTERN HAS COMPLETELY FILLED THE OPENINGS IN THE PATTERN AND HAS FORMED A SUBSTANTIALLY HOMOGENEOUS SLAB HAVING THE PATTERN EMBEDDED THEREIN SUBSTANTIALLY MIDWAY BETWEEN ITS MAJOR SURFACES, AND THEN PULVERIZING THE METAL DEPOSIT AND PATTERN WITHOUT PRIOR SEPARATION.
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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) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |