US2740735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming contact structures of composite metals
Assignee: Chase Shawmut Co
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Filing: 1953-05-18
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Granted: 1956-04-03
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Expires: 1973-05-18
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Swain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:53
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; Y; Y10; Y10S; Y10S72/00; Y10S72/70; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49826; Y10T29/4984; Y10T29/49845; Y10T29/49847; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
IN THE PROCESS OF MANUFACTURING AN ELECTRIC CONTACT FROM A LENGTH OF COMPOSITE METAL COMPRISING LAYERS OF COPPER AND CARBON STEEL INTEGRATED TO FORM A UNITARY METAL SHEET THE STEPS OF PERFORMING AT LEAST ONE BENDING OPERATION ON SAID LENGTH OF METAL WHILE SAID LAYER OF STEEL IS IN THE RELATIVELY SOFT AND NON-RESILIENT STATE OF CARBON STEEL AND SAID LAYER OF COPPER IS IN A RELATIVELY HARD STATE, AND THEREAFTER SUBJECTING SAID PRE-BENT LENGTH OF METAL TO A HEAT-TREATMENT AT SUFFICIENTLY HIGH TEMPERATURES TO RENDER SAID LAYER OF STEEL RELATIVELY HARD AND RESILIENT AND TO RENDER SAID LAYER OF COPPER RELATIVELY SOFT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |