US2654701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plating aluminum
Assignee: Individual
•
Filing: 1950-06-08
•
Granted: 1953-10-06
•
Expires: 1970-06-08
Abstract
No abstract record available.
Inventors
- 👤 Edwin R Calderon
- 👤 George W Slomin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:38
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/42; C25D5/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A METHOD OF PROVIDING OBJECTS, COMPOSED ESSENTIALLY OF ALUMINUM, WITH A TENACIOUSLY ADHERENT, FINE GRAINED ALLOY PLATING, COMPRISING: ETCHING THE DEGREASED SURFACE OF OBJECTS COMPOSED ESSENTIALLY OF ALUMINUM WITH AN AQUEOUS SOLUTION OF ALKALI HYDROXIDE AND ALKALI FLUORIDE AND RINSING THE ETCHED SURFACE; THEN TREATING THE SURFACE WITH DILUTED NITRIC ACID AND RINSING THE SURFACE; THEN FORMING A THIN, ADHERENT FILM OF ZINC ON SUCH TREATED SURFACE; RINSING THE ACTIVATED SURFACE AND ELECTROPLATING THE ACTIVATED SURFACE WITH AN AQUEOUS STRIKE SOLUTION CONTAINING CYANIDES OF COPPER, ZINC AND A METAL FROM THE GROUP CONSISTING OF SILVER, GOLD AND INDIUM, WHILE IMPOSING AN ELECTRICAL CURRENT UPON THE OJBECTS, SAID STRIKE SOLUTION HAVING A PH OF BETWEEN 9 AND 10 AND A SURFACE TENSION BELOW 45 DYNES PER SQUARE CENTIMETER.
Claim 2
Independent Claim
127 words
A METHOD OF PROVIDING OBJECTS, COMPOSED ESSENTIALLY OF ALUMINUM, WITH A TENACIOUSLY ADHERENT, FINE GRAINED ALLOY PLATING, COMPRISING: ETCHING THE DEGREASED SURFACE OF OBJECTS COMPOSED ESSENTIALLY OF ALUMINUM WITH AN AQUEOUS SOLUTION OF ALKALI HYDROXIDE AND ALKALI FLUORIDE AND RINSING THE ETCHED SURFACE; THEN TREATING THE SURFACE WITH DILUTED NITRIC ACID AND RINSING THE SURFACE; THEN FORMING A THIN, ADHERENT FILM OF ZINC ON SUCH TREATED SURFACE; RINSING THE ACTIVATED SURFACE AND ELECTROPLATING THE ACTIVATED SURFACE WITH AN AQUEOUS STRIKE SOLUTION CONTAINING CYANIDES OF COPPER, ZINC AND A METAL FROM THE GROUP CONSISTING OF SILVER, GOLD AND INDIUM, WHILE IMPOSING AN ELECTRICAL CURRENT UPON THE OJBECTS, SAID STRIKE SOLUTION HAVING A PH OF BETWEEN 9 AND 10 AND A SURFACE TENSION BELOW 45 DYNES PER SQUARE CENTIMETER.
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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) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |