US2744008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead-copper-silver alloys and process for producing same
Assignee: Bowdish and Associates Inc
•
Filing: 1954-11-03
•
Granted: 1956-05-01
•
Expires: 1974-11-03
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Hammeras
- 👤 Elver F Bowdish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:17
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/08; C22C30/00; C22C30/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PROCESS OF MAKING AN ALLOY CONSISTING ESSENTIALLY OF LEAD AND AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND SILVER, AND IN WHICH THE LEAD CONTENT IS FROM 30% TO 70%, THE COPPER AND SILVER, WHEN EITHER IS THE ONLY METAL SELECTED FROM SAID GROUP COMPRISING THE REMAINDER OF SAID ALLOY AND THE COPPER AND SILVER, WHEN BOTH ARE SELECTED FROM SAID GROUP, BEING RESPECTIVELY 25% TO 44% COPPER AND 6% TO 25% SILVER, WHICH COMPRISES HEATING AND AGITATING A MOLTEN MIXTURE OF LEAD AND THE METAL OR METALS SELECTED FROM SAID GROUP UNDER A PROTECTIVE FLUX COMPOSED ESSENTIALLY OF HEMATITE ORE UNTIL THE TEMPERATURE OF THE MIXTURE IS RAISED TO FROM 1800* F. TO 2600* F.
Claim 2
Dependent Claim
121 words
A PROCESS OF MAKING AN ALLOY CONSISTING ESSENTIALLY OF LEAD AND AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND SILVER, AND IN WHICH THE LEAD CONTENT IS FROM 30% TO 70%, THE COPPER AND SILVER, WHEN EITHER IS THE ONLY METAL SELECTED FROM SAID GROUP COMPRISING THE REMAINDER OF SAID ALLOY AND THE COPPER AND SILVER, WHEN BOTH ARE SELECTED FROM SAID GROUP, BEING RESPECTIVELY 25% TO 44% COPPER AND 6% TO 25% SILVER, WHICH COMPRISES HEATING AND AGITATING A MOLTEN MIXTURE OF LEAD AND THE METAL OR METALS SELECTED FROM SAID GROUP UNDER A PROTECTIVE FLUX COMPOSED ESSENTIALLY OF HEMATITE ORE UNTIL THE TEMPERATURE OF THE MIXTURE IS RAISED TO FROM 1800* F. TO 2600* F.
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) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |