Patent US4090307A successfully refreshed from Google Patents.
USRE29239E
Expired / Lapsed
US
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Ternary alloys
Assignee: Whyco Chromium Co Inc
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Filing: 1975-09-17
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Granted: 1977-05-31
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Expires: 1995-09-17
Abstract
Abstract Bright, tarnish resistant and color stable ternary alloys of about 40 - 90% of tin, about 10 - 50% cobalt and about 1 - 28% of a third metal of Periodic Group II B , III B or VI B . Typical third metals are zinc, cadmium, indium, antimony or chromium. The alloys are electrodeposited from aqueous acidic baths at a temperature of about 50 - 85° C and current density of about 5 - 45 A/ft.
Inventors
- 👤 Jacob Hyner
- 👤 Robert A. Michelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:11
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C22; C22C; C22C13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A bright, tarnish resistant and color stable ternary alloy consisting essentially of about 40- 90 wt. % tin 10- 50 wt. % cobalt 1- 28 wt. % third metal wherein said third metal is antimony.Iadd., zinc .Iaddend.or a metal of Periodic Group .[.II B ,.]. III A or VI B . .[.2. A ternary alloy as in claim 1 wherein said third metal is zinc, cadmium, indium, or
Claim 2
Dependent Claim
18 words
chromium..]. 3. A ternary alloy as in claim 1 wherein said third metal is zinc, indium or chromium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |