US2732294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of copper
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
•
Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:13
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A SINGLE STAGE PROCESS FOR THE PRODUCTION OF PHOSPHORUS DEOXIDISED COPPER WHICH COMPRISES THE STEPS OF INTRODUCING INTO A FURNACE, OF THE KIND IN WHICH GASES GENERATED BY THE COMBUSTION OF FUEL DO NOT MAKE CONTACT WITH THE CONTENTS OF THE FURNACE, BLISTER COPPER CONTAINING NOT MORE THAN 99.8% COPPER, NOT MORE THAN 0.03% SULPHUR, FROM 0.1% TO 0.5% OXYGEN, NOT MORE THAN 0.03% IRON AND SUBSTANTIALLY NO ANTIMONY, BISMUTH, LEAD, SELENIUM OR TELLURIUM, MELTING SAID COPPER, CONTROLLING THE CONDITIONS IN THE FURNACE TO ASSIST THE REMOVAL OF VOLATILE IMPURITIES DURING SAID MELTING, CONTINUING THE HEATING OF SAID MOLTEN COPPER UNDER SAID CONTROLLED CONDITIONS UNTIL ITS COMPOSITION IS SUITABLE FOR PHOROUS DEOXIDATION, ADDING SUFFICIENT PHOSPHORUS TO SAID COPPER TO COMPLETELY DEOXIDISE SAID COPPER AND CASTING SAID COPPER INTO MOULDS.
Claim 2
Dependent Claim
129 words
A SINGLE STAGE PROCESS FOR THE PRODUCTION OF PHOSPHORUS DEOXIDISED COPPER WHICH COMPRISES THE STEPS OF INTRODUCING INTO A FURNACE, OF THE KIND IN WHICH GASES GENERATED BY THE COMBUSTION OF FUEL DO NOT MAKE CONTACT WITH THE CONTENTS OF THE FURNACE, BLISTER COPPER CONTAINING NOT MORE THAN 99.8% COPPER, NOT MORE THAN 0.03% SULPHUR, FROM 0.1% TO 0.5% OXYGEN, NOT MORE THAN 0.03% IRON AND SUBSTANTIALLY NO ANTIMONY, BISMUTH, LEAD, SELENIUM OR TELLURIUM, MELTING SAID COPPER, CONTROLLING THE CONDITIONS IN THE FURNACE TO ASSIST THE REMOVAL OF VOLATILE IMPURITIES DURING SAID MELTING, CONTINUING THE HEATING OF SAID MOLTEN COPPER UNDER SAID CONTROLLED CONDITIONS UNTIL ITS COMPOSITION IS SUITABLE FOR PHOROUS DEOXIDATION, ADDING SUFFICIENT PHOSPHORUS TO SAID COPPER TO COMPLETELY DEOXIDISE SAID COPPER AND CASTING SAID COPPER INTO MOULDS.
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) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |