US3414402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of low grade iron ores
Assignee: HRI Inc
•
Filing: 1967-06-16
•
Granted: 1968-12-03
•
Expires: 1987-06-16
Abstract
No abstract record available.
Inventors
- 👤 Volk William
- 👤 Clarence A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:03
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/005; B03C1/015; C; C21; C21B; C21B13/00; C21B13/0086; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |