Patent US3502134A successfully refreshed from Google Patents.
US3502134A
Expired / Lapsed
US
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Continuous casting method with inert gas puffs to prevent skulling
Assignee: United States Steel Corp
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Filing: 1967-07-19
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Granted: 1970-03-24
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Expires: 1987-07-19
Abstract
No abstract record available.
Inventors
- 👤 Michael A Orehoski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:21
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/10; B22D11/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1417269A
Cited
US2023957A
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US2290083A
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DE872634C
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AT228418B
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US3174200A
Cited
FR1395648A
Cited
US3253307A
Cited
US3395831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |