US2856491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contact alloy of platinum group metal and zinc and method of making same
Assignee: North Electric Co
•
Filing: 1952-09-27
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Granted: 1958-10-14
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Expires: 1972-09-27
Abstract
No abstract record available.
Inventors
- 👤 Donivan L Hall
- 👤 Arthur E Middleton
- 👤 Earl R Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:21
CPC Classifications
C; C22; C22C; C22C5/00; C22C5/04; H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H11/00; H01H11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
AN ELECTRICAL CONTACT MEMBER FORMED OF AN ALLOY CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER OF THE PLATINUM FAMILY AND ZINC, SAID ALLOY NOT HAVING IN EXCESS OF ABOUT 35 PERCENT BY WEIGHT OF ZINC.
Claim 2
Dependent Claim
35 words
AN ELECTRICAL CONTACT MEMBER FORMED OF AN ALLOY CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER OF THE PLATINUM FAMILY AND ZINC, SAID ALLOY NOT HAVING IN EXCESS OF ABOUT 35 PERCENT BY WEIGHT OF ZINC.
References Cited (Backward Citations)
US949837A
Cited
US1779602A
Cited
US2191666A
Cited
US2058857A
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US2319364A
Cited
US2406172A
Cited
US2446908A
Cited
US2413604A
Cited
US2432657A
Cited
US2418710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |