US3452968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roasting process of fine ore and a device therefor
Assignee: IHI Corp
•
Filing: 1967-10-12
•
Granted: 1969-07-01
•
Expires: 1987-10-12
Abstract
No abstract record available.
Inventors
- 👤 Makoto Shimizu
- 👤 Masao Seki
- 👤 Shinji Nishizaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:56
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2413420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |