US3729309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for adding alloying elements to molten metals
Assignee: JFE Engineering Corp
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Filing: 1970-03-02
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Granted: 1973-04-24
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Expires: 1990-03-02
Abstract
Abstract A METHOD FOR ADDING ALLOYING ELEMENTS SUCH AS ALUMINIUM, TITANIUM TO MOLTEN METALS, SAID ELEMENTS BEING CAPABLE OF REACTING WITH THE ATMOSPHERE SURROUNDING THE METALS, COMPRISING INSERTING A WIRE ROD MADE OF THE ELEMENT INTO A MOLTEN METAL BATH AT A CONTROLLED SPEED, SAID ROD HAVING A CONTROLLED IZE, SO AS TO PRODUCE A REFINED AND PURIFIED METAL ALLOY.
Inventors
- 👤 T Kawawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:32
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/0056; C22; C22C; C22C1/00; C22C1/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10T; Y10T428/00; Y10T428/12; Y10T428/12222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |