US3258328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for treating steel
Assignee: Fuji Iron and Steel Co Ltd
•
Filing: 1963-05-16
•
Granted: 1966-06-28
•
Expires: 1983-05-16
Abstract
No abstract record available.
Inventors
- 👤 Norman P Goss
- 👤 Watanabe Shozo
- 👤 Matsuoka Hideo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:03
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/076; C21C7/064; C21C7/0645; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A DEOXIDIZER AND DESULPHURIZER FLUX COMPOSED OF INTERMIXED, SOLID PARTICLES OF ALUMINUM, CALCIUM SILICON FLUX, CALCIUM FLUORIDE, AND A DESULFURIZER SELECTED FROM THE GROUP CONSISTING OF NAOH, NA2CO3 AND MG(OH)2 AND FERRO-MANGANESE.
Claim 2
Dependent Claim
32 words
A DEOXIDIZER AND DESULPHURIZER FLUX COMPOSED OF INTERMIXED, SOLID PARTICLES OF ALUMINUM, CALCIUM SILICON FLUX, CALCIUM FLUORIDE, AND A DESULFURIZER SELECTED FROM THE GROUP CONSISTING OF NAOH, NA2CO3 AND MG(OH)2 AND FERRO-MANGANESE.
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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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |