US2750255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for rendering titanium minerals and ores soluble in acids
Assignee: Individual
•
Filing: 1952-06-09
•
Granted: 1956-06-12
•
Expires: 1972-06-09
Abstract
No abstract record available.
Inventors
- 👤 Ellis E Creitz
- 👤 Henry G Iverson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:05
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1204; C22B34/1209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR CONVERTING DIFFICULTLY SOLUBLE TITANIUM MINERALS TO ACID-SOLUBLE FORM COMPRISING GRINDING THE TITANIUM MINERALS TO PASS A 200 MESH SCREEN, MIXING THE FINELY DIVIDED TITANIUM MINERALS WITH FINELY DIVIDED SIDERITE TO PROVIDE AN ADMIXTURE CONTAINING TIO2 AND FE IN A WEIGHT RATIO WITHIN THE RANGE OF FROM ABOUT ONE TO ABOUT FOUR, SINTERING THE ADMIXING MATERIALS AT A TEMPERATURE OF FROM ABOUT 2100* F. TO ABOUT 2500* F. FOR AT LEAST 10 MINUTES IN A SUBSTANTIALLY NON-OXIDIZING ATMOSPHERE CONTAINING CARBON DIOXIDE, AND QUENCHING THE SINTERED MATERIAL.
Claim 2
Dependent Claim
88 words
A PROCESS FOR CONVERTING DIFFICULTLY SOLUBLE TITANIUM MINERALS TO ACID-SOLUBLE FORM COMPRISING GRINDING THE TITANIUM MINERALS TO PASS A 200 MESH SCREEN, MIXING THE FINELY DIVIDED TITANIUM MINERALS WITH FINELY DIVIDED SIDERITE TO PROVIDE AN ADMIXTURE CONTAINING TIO2 AND FE IN A WEIGHT RATIO WITHIN THE RANGE OF FROM ABOUT ONE TO ABOUT FOUR, SINTERING THE ADMIXING MATERIALS AT A TEMPERATURE OF FROM ABOUT 2100* F. TO ABOUT 2500* F. FOR AT LEAST 10 MINUTES IN A SUBSTANTIALLY NON-OXIDIZING ATMOSPHERE CONTAINING CARBON DIOXIDE, AND QUENCHING THE SINTERED MATERIAL.
References Cited (Backward Citations)
US2197085A
Cited
US2375268A
Cited
US2417101A
Cited
US2471242A
Cited
US2453050A
Cited
US2445377A
Cited
US2476453A
Cited
US2631941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |