US3113196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contact
Assignee: Engelhard Industries Inc
•
Filing: 1960-10-31
•
Granted: 1963-12-03
•
Expires: 1980-10-31
Abstract
No abstract record available.
Inventors
- 👤 Howard E Spooner
- 👤 Adolph G Bergmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:52
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A COMPOSITE ELECTRICAL CONTACT MEMBER HAVING A PLURALITY OF LATERALLY SPACED ELONGATED CONTACT RIDGES ON A SURFACE THEREOF FOR USE WITH A SECOND CONTACT MEMBER SLIDABLE BETWEEN AND IN CONTACT WITH SAID COMPOSITE CONTACT MEMBER RIDGES, COMPRISING A LAYER OF ELECTRICALLY CONDUCTIVE BASE METAL, THE BASE METAL LAYER HAVING A SURFACE IN THE FORM OF A PLURALITY OF LATERALLY-SPACED LONGITUDINALLY PARALLEL RIDGES HAVING A GROOVE THEREBETWEEN, A LAYER OF PRECIOUS METAL BONDED TO THE SAID SURFACE OF THE BASE METAL LAYER, THE THICKNESS OF THE PRECIOUS METAL LAYER ON THE RIDGES BEING AT LEAST TWICE THE THICKNESS OF THE PRECIOUS METAL LAYER ON THE GROOVE.
Claim 2
Dependent Claim
105 words
A COMPOSITE ELECTRICAL CONTACT MEMBER HAVING A PLURALITY OF LATERALLY SPACED ELONGATED CONTACT RIDGES ON A SURFACE THEREOF FOR USE WITH A SECOND CONTACT MEMBER SLIDABLE BETWEEN AND IN CONTACT WITH SAID COMPOSITE CONTACT MEMBER RIDGES, COMPRISING A LAYER OF ELECTRICALLY CONDUCTIVE BASE METAL, THE BASE METAL LAYER HAVING A SURFACE IN THE FORM OF A PLURALITY OF LATERALLY-SPACED LONGITUDINALLY PARALLEL RIDGES HAVING A GROOVE THEREBETWEEN, A LAYER OF PRECIOUS METAL BONDED TO THE SAID SURFACE OF THE BASE METAL LAYER, THE THICKNESS OF THE PRECIOUS METAL LAYER ON THE RIDGES BEING AT LEAST TWICE THE THICKNESS OF THE PRECIOUS METAL LAYER ON THE GROOVE.
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US2864921A
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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) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |