US3717511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making hardenable copper alloy products
Assignee: KM Kabelmetal AG
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Filing: 1968-08-14
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Granted: 1973-02-20
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Expires: 1988-08-14
Abstract
Abstract A METHOD OF IMPROVING THE PROPERTIES OF HEAT HARDENABLE COPPER ALLOYS BY HEATING THE ALLOY IN ITS ORIGINAL CAST FORM TO ITS SOLUTION ANNEALING TEMPERATURE, WORKING THE HEATED ALLOY TO A SELECTED SEMI-FINISHED CROSS SECTION AND IMMEDIATELY THEREAFTER QUENCHING THE ALLOY IN ITS WORKED FORM TO THEREBY OBTAIN A FINE GRAIN STRUCTURE GIVING RISE TO IMPROVED MECHANICAL AND ELECTRICAL PROPERTIES.
Inventors
- 👤 H Wallbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:06
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/02; H01B1/026; C; C22; C22C; C22C9/00; C22F; C22F1/00; C22F1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |