Patent US2612898A successfully refreshed from Google Patents.
US2612898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning of manufactured jewelry
Assignee: —
•
Filing: —
•
Granted: 1952-10-07
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Expires: 1969-10-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:28
CPC Classifications
—
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
THE METHOD OF CHEMICALLY CLEANING METAL JEWELRY PARTS MADE OF GOLD-FILLED, KARAT GOLD, SILVER, BRASS, ALLOYS AND THE LIKE TO REMOVE OXIDATION, COMPRISING THE STEPS OF IMMERSING THE JEWELRY PARTS IN A SOLUTION CONTAINING WHEN PREPARED FIVE TO TEN OUNCES BY WEIGHT OF ALKALI METAL CYANIDE AND HYDROGEN, PEROXIDE EQUIVALENT TO 500 TO 300 CC. OF 33% SOLUTION PER 3 1/2 GALLONS OF WATER, AND AGITATING THE JEWELRY PARTS WHILE IMMERSED, THE TIME OF IMMERSION AND AGITATION BEING NOT MORE THAN FIFTEEN MINUTES.
Claim 2
Independent Claim
83 words
THE METHOD OF CHEMICALLY CLEANING METAL JEWELRY PARTS MADE OF GOLD-FILLED, KARAT GOLD, SILVER, BRASS, ALLOYS AND THE LIKE TO REMOVE OXIDATION, COMPRISING THE STEPS OF IMMERSING THE JEWELRY PARTS IN A SOLUTION CONTAINING WHEN PREPARED FIVE TO TEN OUNCES BY WEIGHT OF ALKALI METAL CYANIDE AND HYDROGEN, PEROXIDE EQUIVALENT TO 500 TO 300 CC. OF 33% SOLUTION PER 3 1/2 GALLONS OF WATER, AND AGITATING THE JEWELRY PARTS WHILE IMMERSED, THE TIME OF IMMERSION AND AGITATION BEING NOT MORE THAN FIFTEEN MINUTES.
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Cited
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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) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |