US3075281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing an electrical contact element
Assignee: Engelhard Industries Inc
•
Filing: 1958-10-03
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Granted: 1963-01-29
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Expires: 1978-10-03
Abstract
No abstract record available.
Inventors
- 👤 Howard E Spooner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:51
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/04; H01H1/00; H01H1/02; H01H50/00; H01H50/54; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/4921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A METHOD FOR PRODUCING AN ELECTRICAL CONTACT ELEMENT HAVING AT LEAST ONE CONTACT POINT OF SILVER CONTAINING A BASE METAL OXIDE AND MOUNTED IN A BASE METAL SUPPORT, WHICH COMPRISES FORMING A DISC FROM A LIMINATED METAL SHEET HAVING FIRST AND SECOND LAYERS BONDED TO EACH OTHER, THE FIRST LAYER CONSISTING ESSENTIALLY OF A THIN LAYER OF SILVER IN ADMIXTURE WITH AN OXIDE OF A BASE METAL SELECTED FROM THE GROUP CONSISTING OF IRON, COBALT, NICKLE, COPPER, CADMIUM, CHROMIUM, MANGANESE, TIN AND ADMIXTURES THEREOF, THE SECOND LAYER CONSISTING ESSENTIALLY OF A COMPARATIVELY THICKER LAYER OF SILVER; INSERTING THE DISC INTO AN APERTURE IN SAID SUPPORT; BONDING THE SIDE WALL OFF THE SECOND LAYER OF THE DISC DIRECTLY TO THE ADJACENT WALL OT HE APERTURE BY MEANS OF A HEAT TREATMENT; AND DISPLACING THE BONDED DISC OUTWARDLY FROM THE PLANE OF THE SUPPORT TO FORM A RAISED CONTACT POINT.
Claim 2
Independent Claim
148 words
A METHOD FOR PRODUCING AN ELECTRICAL CONTACT ELEMENT HAVING AT LEAST ONE CONTACT POINT OF SILVER CONTAINING A BASE METAL OXIDE AND MOUNTED IN A BASE METAL SUPPORT, WHICH COMPRISES FORMING A DISC FROM A LIMINATED METAL SHEET HAVING FIRST AND SECOND LAYERS BONDED TO EACH OTHER, THE FIRST LAYER CONSISTING ESSENTIALLY OF A THIN LAYER OF SILVER IN ADMIXTURE WITH AN OXIDE OF A BASE METAL SELECTED FROM THE GROUP CONSISTING OF IRON, COBALT, NICKLE, COPPER, CADMIUM, CHROMIUM, MANGANESE, TIN AND ADMIXTURES THEREOF, THE SECOND LAYER CONSISTING ESSENTIALLY OF A COMPARATIVELY THICKER LAYER OF SILVER; INSERTING THE DISC INTO AN APERTURE IN SAID SUPPORT; BONDING THE SIDE WALL OFF THE SECOND LAYER OF THE DISC DIRECTLY TO THE ADJACENT WALL OT HE APERTURE BY MEANS OF A HEAT TREATMENT; AND DISPLACING THE BONDED DISC OUTWARDLY FROM THE PLANE OF THE SUPPORT TO FORM A RAISED CONTACT POINT.
References Cited (Backward Citations)
US2148040A
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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) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |