US3386815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for roasting iron sulfide materials
Assignee: Boliden AB
•
Filing: 1965-11-04
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Granted: 1968-06-04
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Expires: 1985-11-04
Abstract
No abstract record available.
Inventors
- 👤 Gorling Karl Goran
- 👤 Lundqvist Sven Anders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:04
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/52; C01G; C01G49/00; C01G49/02; C01G49/08; C22B1/08; C22B1/10; C22B1/14; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2766102A
Cited
US2993778A
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US2596580A
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US2796340A
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US2978297A
Cited
GB857867A
Cited
US3169853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |