US2523092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for extraction of iron
Assignee: Individual
•
Filing: 1949-12-23
•
Granted: 1950-09-19
•
Expires: 1969-12-23
Abstract
No abstract record available.
Inventors
- 👤 Bryk Petri Baldur
- 👤 Ryselin Johan Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:55
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A METHOD FOR REDUCING IRON FROM FERRO SILICATE RAW MATERIAL WHICH COMPRISES, PROVIDING SUCH RAW MATERIAL IN MOLTEN STATE, APPLYING A CHARGE COMPOSED OF A MIXTURE OF LIME AND CARBONACEOUS MATERIAL IN SOLID STATE ON THE TOP OF SAID RAW MATERIAL, HEATING SAID CHARGE ON TOP OF SAID RAW MATERIAL TO PRODUCE CALCIUM CARBIDE IN LIQUID STATE, CAUSING SAID LIQUID CALCUIM CARBIDE TO BE TAKEN INTO SAID RAW MATERIAL AND TO
Claim 2
Independent Claim
71 words
A METHOD FOR REDUCING IRON FROM FERRO SILICATE RAW MATERIAL WHICH COMPRISES, PROVIDING SUCH RAW MATERIAL IN MOLTEN STATE, APPLYING A CHARGE COMPOSED OF A MIXTURE OF LIME AND CARBONACEOUS MATERIAL IN SOLID STATE ON THE TOP OF SAID RAW MATERIAL, HEATING SAID CHARGE ON TOP OF SAID RAW MATERIAL TO PRODUCE CALCIUM CARBIDE IN LIQUID STATE, CAUSING SAID LIQUID CALCUIM CARBIDE TO BE TAKEN INTO SAID RAW MATERIAL AND TO
References Cited (Backward Citations)
US1300410A
Cited
US1296384A
Cited
US1319061A
Cited
US1471270A
Cited
GB236255A
Cited
US2350725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |