US2895821A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for refining blister copper
Assignee: BRIAN JACKSON ASSOCIATES Inc
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Filing: 1954-05-18
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Granted: 1959-07-21
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Expires: 1974-05-18
Abstract
No abstract record available.
Inventors
- 👤 Eugene R Redmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:51
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN THE PROCESS OF REFINING BLISTER COPPER IN THE CONVERTER IN WHICH IT IS FORMED WHICH INCLUDES BLOWING AIR INTO A MOLTEN MASS OF BLISTER COPPER, AND CONTINUING THE AIR BLOW TO THE WORM STAGE, THE IMPROVEMENT COMPRISING REFINING SAID BLISTER COPPER THROUGH THE WORM STAGE INCLUDING THE STEPS OF ADDING A SILICA FLUX TO THE MASS AS THE WORM IS JUST ABOUT TO DISAPPEAR, CONTINUING THE BLOW UNTIL THE SILICA FLUX HAS FORMED A SOLID COATING OVER SAID MASS AND POURING SAID MASS OUT FROM UNDERR SAID COATING.
Claim 2
Dependent Claim
89 words
IN THE PROCESS OF REFINING BLISTER COPPER IN THE CONVERTER IN WHICH IT IS FORMED WHICH INCLUDES BLOWING AIR INTO A MOLTEN MASS OF BLISTER COPPER, AND CONTINUING THE AIR BLOW TO THE WORM STAGE, THE IMPROVEMENT COMPRISING REFINING SAID BLISTER COPPER THROUGH THE WORM STAGE INCLUDING THE STEPS OF ADDING A SILICA FLUX TO THE MASS AS THE WORM IS JUST ABOUT TO DISAPPEAR, CONTINUING THE BLOW UNTIL THE SILICA FLUX HAS FORMED A SOLID COATING OVER SAID MASS AND POURING SAID MASS OUT FROM UNDERR SAID COATING.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |