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Patent US3556779A successfully refreshed from Google Patents.
US3556779A
Expired / Lapsed
US
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Copper-lead alloy
Assignee: Colorado Springs National Bank
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Filing: 1968-02-19
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Granted: 1971-01-19
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Expires: 1988-02-19
Abstract
Abstract A METHOD OF MAKING A HOMOGENOUS COPOPER-LED ALLOY, AND THE ALLOY AND ITS USES, WHERIN THE METHOD COMPRISES ADDING AN EFFECTIVE AMOUNT OF A HOMOGENEITY PROMOTER TO A MIXTURE OF MOLTEN LEAD AND COPPER. THE PROMOTER CONSISTS ESSENTIALLY OF ELEMENTAL CARBON AND AN ALKALI METAL COMPOUND CAPABLE OF REACTING TO FORM A GAS. AN EXAMPLE OF THE ALKALI METAL COMPOUND IS SODIUM CARBONATE. USES FOR THE ALLOY INCLUDE BEARINGS, LUBRICANTS AND AS A ADDITIVE TO PETROLEUM AND VEGETABLE BASED LUBRICATING COMPOUNDS.
Inventors
- 👤 Robert Turkisher
- 👤 Charles E Lundin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:34
CPC Classifications
F; F42; F42B; F42B14/00; F42B14/02; C; C10; C10M; C10M103/00; C10M103/04; C10M125/00; C10M125/04; C22; C22C; C22C1/00; C22C1/02; C22C11/00; C22C11/02; C22C9/00; C22C9/08; C10M2201/00; C10M2201/04; C10M2201/05; C10N; C10N2050/00; C10N2050/10
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |