Patent US3095363A successfully refreshed from Google Patents.
US3095363A
Expired / Lapsed
US
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Calcination of zinc sulfide concentrates
Assignee: Atlantic Richfield Co
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Filing: 1960-02-17
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Granted: 1963-06-25
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Expires: 1980-02-17
Abstract
No abstract record available.
Inventors
- 👤 Kurt F Ruckwardt
- 👤 Bernard T Mcdonald
- 👤 John F Mahoney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:45
CPC Classifications
C; C01; C01G; C01G9/00; C01G9/02; C22; C22B; C22B1/00; C22B1/02; C22B19/00; C22B19/02; C22B19/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN A PROCESS IN WHICH A ZINC SULFIDE CONCENTRATE IS ROASTED IN AN OXIDIZING ATMOSPHERE TO CONVERT THE ZINC SULFIDE TO ZINC OXIDE, THE IMPROVEMENT WHICH COMPRISES INCORPORATING FROM ABOUT 0.5 TO ABOUT 1 PERCENT BY WEIGHT OF ZINC SULFATE IN THE ZINC SULFIDE CONCENTRATE PRIOR TO ROASTING TO SUBSTANTIALLYIMPROVE OXIDATION OF THE SULFUR CONTENT OF THE CONCENTRATE AND TO SUBSTANTIALLY DECREASE THE AMOUNT OF RESIDUAL SULFIDE-SULFUR REMAINING IN THE CALCINE PRODUCT.
Claim 2
Dependent Claim
72 words
IN A PROCESS IN WHICH A ZINC SULFIDE CONCENTRATE IS ROASTED IN AN OXIDIZING ATMOSPHERE TO CONVERT THE ZINC SULFIDE TO ZINC OXIDE, THE IMPROVEMENT WHICH COMPRISES INCORPORATING FROM ABOUT 0.5 TO ABOUT 1 PERCENT BY WEIGHT OF ZINC SULFATE IN THE ZINC SULFIDE CONCENTRATE PRIOR TO ROASTING TO SUBSTANTIALLYIMPROVE OXIDATION OF THE SULFUR CONTENT OF THE CONCENTRATE AND TO SUBSTANTIALLY DECREASE THE AMOUNT OF RESIDUAL SULFIDE-SULFUR REMAINING IN THE CALCINE PRODUCT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |