US3307937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method when degassing carboncontaining metal melts
Assignee: Nyby Bruk AB
•
Filing: 1965-04-12
•
Granted: 1967-03-07
•
Expires: 1985-04-12
Abstract
No abstract record available.
Inventors
- 👤 Pihlblad Karl Erik
- 👤 Wagner Anton Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:37
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10; C21C7/04; C21C7/068; C21C7/0685; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD FOR DECARBURIZING AND DEGRASSING MOLTEN STEEL, COMPRISING BLOWING AT LEAST ONE POWERFUL JET OF AN INERT GAS AGAINST THE SURFACE OF THE MOLTEN STEEL, THEREAFTER ADDING OXYGEN TO SAID JET OF INERT GAS IN A QUANTITY SUFFICIENT FOR OXIDIZING CARBON BUT INSUFFICIENT FOR PRODUCING HEAVY IRON FUME, AND CONTINUING ADDING OXYGEN UNTIL THE DESIRED CARBON CONTENT HAS BEEN REACHED.
Claim 2
Independent Claim
61 words
A METHOD FOR DECARBURIZING AND DEGRASSING MOLTEN STEEL, COMPRISING BLOWING AT LEAST ONE POWERFUL JET OF AN INERT GAS AGAINST THE SURFACE OF THE MOLTEN STEEL, THEREAFTER ADDING OXYGEN TO SAID JET OF INERT GAS IN A QUANTITY SUFFICIENT FOR OXIDIZING CARBON BUT INSUFFICIENT FOR PRODUCING HEAVY IRON FUME, AND CONTINUING ADDING OXYGEN UNTIL THE DESIRED CARBON CONTENT HAS BEEN REACHED.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |