US2879159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper and copper base alloys and methods of making the same
Assignee: American Metallurgical Products Co
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Filing: 1955-04-26
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Granted: 1959-03-24
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Expires: 1975-04-26
Abstract
No abstract record available.
Inventors
- 👤 Wilbur T Bolkcom
- 👤 William E Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:37
CPC Classifications
C; C22; C22C; C22C9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD OF ELIMINATING HOT SHORTNESS IN COPPER AND COPPER ALLOYS HAVING LEAD INCIDENTAL TO ITS MANUFACTURE AS AN IMPURITY IN ORDINARY AMOUNTS, COMPRISING THE STEPS OF REDUCING SAID ALLOYS TO THE MOLTEN STATE, ADDING TO SAID ALLOYS WHILE IN THE MOLTEN STATE AT LEAST 50% BY WEIGHT AS MUCH RARE EARTH METAL AS LEAD ORIGINALLY PRESENT AND SOLIDIFYING THE RESULTING MOLTEN MASS.
Claim 2
Independent Claim
63 words
A METHOD OF ELIMINATING HOT SHORTNESS IN COPPER AND COPPER ALLOYS HAVING LEAD INCIDENTAL TO ITS MANUFACTURE AS AN IMPURITY IN ORDINARY AMOUNTS, COMPRISING THE STEPS OF REDUCING SAID ALLOYS TO THE MOLTEN STATE, ADDING TO SAID ALLOYS WHILE IN THE MOLTEN STATE AT LEAST 50% BY WEIGHT AS MUCH RARE EARTH METAL AS LEAD ORIGINALLY PRESENT AND SOLIDIFYING THE RESULTING MOLTEN MASS.
References Cited (Backward Citations)
US2357190A
Cited
US2802733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |