US3925073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gold/silver alloys
Assignee: GLOBUS DAVID A
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Filing: 1974-11-26
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Granted: 1975-12-09
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Expires: 1994-11-26
Abstract
Abstract A tarnish resistant Au/Ag alloy of low gold content exhibiting properties desired in jewelry manufacture consisting essentially of about 25 to 30 percent by weight gold, about 45 to 71 percent by weight silver, about 3 to 25 percent by weight copper, and 0 to about 5 percent by weight zinc.
Inventors
- 👤 Edward Louis Kohrn
- 👤 Seymour Globus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:42
CPC Classifications
C; C22; C22C; C22C5/00; C22C5/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
38 words
A METAL ALLOY CONSISTING ESSENTIALLY OF ABOUT 25 TO 30 PERCENT BY WEIGHT GOLD, ABOUT 57 TO 71 PERCENT BY WEIGHT SILVER, ABOUT 3 TO 10 PERCENT BY WEIGHT COPPER AND ABOUT 0 TO 5 WEIGHT PERCENT ZINC.
Claim 2
Dependent Claim
38 words
A METAL ALLOY CONSISTING ESSENTIALLY OF ABOUT 25 TO 30 PERCENT BY WEIGHT GOLD, ABOUT 57 TO 71 PERCENT BY WEIGHT SILVER, ABOUT 3 TO 10 PERCENT BY WEIGHT COPPER AND ABOUT 0 TO 5 WEIGHT PERCENT ZINC.
Claim 3
Dependent Claim
39 words
A metal alloy consisting essentially of about 25 to 30 percent by weight gold, about 65 to 68 percent by weight silver, about 3 to 10 percent by weight copper and about 0 to 2 percent by weight zinc.
Claim 4
Dependent Claim
39 words
A metal alloy consisting essentially of about 25 to 30 percent by weight gold, about 65 to 68 percent by weight silver, about 3 to 10 percent by weight copper and about 0 to 2 percent by weight zinc.
Claim 5
Dependent Claim
11 words
An article of jewelry formed of the alloy of claim 1.
Claim 6
Dependent Claim
11 words
An article of jewelry formed by the alloy of claim 2.
References Cited (Backward Citations)
US1090939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |