Patent US2664618A successfully refreshed from Google Patents.
US2664618A
Expired / Lapsed
US
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Electrical contact
Assignee: Fansteel Inc
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Filing: 1944-04-22
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Granted: 1954-01-05
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Expires: 1964-04-22
Abstract
No abstract record available.
Inventors
- 👤 John D Kleis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:25
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/023; H01H1/0237; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/929; Y10S75/00; Y10S75/95; Y10S75/951
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
AN ELECTRICAL CONTACT SUITABLE FOR USE IN APPARATUS SUCH AS RELAYS SWITCHES, CIRCUIT BREAKERS AND THE LIKE, WHEREIN AN APRECIABLE CONTACT PRESSURE IS USED, SAID CONTACT HAVING AN ELECTRICAL CONTACT SURFACE AND BEING MADE OF A COMPACTED, SINTERED AND NON-POROUS COMPOSITION CONTAINING SILVER, MOLYBDENUM OXIDE IN AN AMOUNT UP TO ABOUT 50% BY WEIGHT OF THE SILVER, AND CARBON IN AN AMOUNT UP TO ABOUT 5% BY WEIGHT OF THE CONTACT COMPOSITION.
Claim 2
Dependent Claim
72 words
AN ELECTRICAL CONTACT SUITABLE FOR USE IN APPARATUS SUCH AS RELAYS SWITCHES, CIRCUIT BREAKERS AND THE LIKE, WHEREIN AN APRECIABLE CONTACT PRESSURE IS USED, SAID CONTACT HAVING AN ELECTRICAL CONTACT SURFACE AND BEING MADE OF A COMPACTED, SINTERED AND NON-POROUS COMPOSITION CONTAINING SILVER, MOLYBDENUM OXIDE IN AN AMOUNT UP TO ABOUT 50% BY WEIGHT OF THE SILVER, AND CARBON IN AN AMOUNT UP TO ABOUT 5% BY WEIGHT OF THE CONTACT COMPOSITION.
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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) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |