US2706759A
Expired / Lapsed
US
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Refractory contacts
Assignee: Gibson Electric Co
•
Filing: 1951-07-14
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Granted: 1955-04-19
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Expires: 1971-07-14
Abstract
No abstract record available.
Inventors
- 👤 George L Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:12
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H1/0233; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216; Y10T428/12174; Y10T428/12451; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12861; Y10T428/12896; Y10T428/12944
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
AN ELECTRICAL CONTACT COMPRISING AT LEAST ONE REFRACTORY MATERIAL FROM THE GROUP CONSISTING OF TUNGSTEN TUNGSTEN CARBIDE, MOLYBDENUM AND MOLYBDENUM CARBIDE, SAID REFRACTORY MATERIAL HAVING A SERRATED SURFACE AND BEING IMPREGNATED WITH SILVER AND A WELDABLE METALLIC BACKING IN CONTACT WITH THE SERRATED EDGE OF SAID CONTACT AND BONDED TO SAID CONTACT THROUGH THE SAID IMPREGNATING MATERIAL.
References Cited (Backward Citations)
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US2298999A
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US2414463A
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US2464591A
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US2504906A
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US2641670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |