US2999749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing non-aging rimmed steels
Assignee: Union Carbide Corp
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Filing: 1958-09-17
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Granted: 1961-09-12
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Expires: 1978-09-17
Abstract
No abstract record available.
Inventors
- 👤 Earle R Saunders
- 👤 Russell M Franks
- 👤 Carl A Beiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:06
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/0006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD FOR THE PRODUCTION OF NON-AGING RIMMED STEEL WHICH COMPRISES PROVIDING A MOLTEN BATH OF STEEL, ADDING TO SAID MOLTEN BATH AN ADDITION AGENT COMPRISING AT LEAST 25 PERCENT MANGANESE AND AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF COLUMBIUM, TANTALUM, VANADIUM, AND BORON IN AN AMOUNT SUFFICIENT TO COMBINE WITH THE NITROGEN IN SAID STEEL.
Claim 2
Independent Claim
59 words
A METHOD FOR THE PRODUCTION OF NON-AGING RIMMED STEEL WHICH COMPRISES PROVIDING A MOLTEN BATH OF STEEL, ADDING TO SAID MOLTEN BATH AN ADDITION AGENT COMPRISING AT LEAST 25 PERCENT MANGANESE AND AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF COLUMBIUM, TANTALUM, VANADIUM, AND BORON IN AN AMOUNT SUFFICIENT TO COMBINE WITH THE NITROGEN IN SAID STEEL.
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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |