US3412781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of using a low carbon steel composition in a continuous casting process
Assignee: United States Steel Corp
•
Filing: 1965-09-21
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Granted: 1968-11-26
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Expires: 1985-09-21
Abstract
No abstract record available.
Inventors
- 👤 John H Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:46
CPC Classifications
B; B22; B22D; B22D11/00; C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32; C21C7/00; C21C7/04; C21C7/06; C22; C22C; C22C38/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49991
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |