Patent US3746535A successfully refreshed from Google Patents.
US3746535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct reduction process for making titanium
Assignee: Ortech Corp
•
Filing: 1971-06-04
•
Granted: 1973-07-17
•
Expires: 1991-06-04
Abstract
Abstract TITANIUM METAL IS RECOVERED FROM TITANIUM DIOXIDECONTAINING MATERIALS, SUCH AS RUTILE OR ILMENITE, BY REDUCTION OF THE ORE WITH A METALLIC REDUCING AGENT TO FORM AN ALLOY OF TITANIUM AND REFINING THE ALLOY TO RECOVER SUBSTANTIALLY PURE TITANIUM METAL.
Inventors
- 👤 H Brandstatter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:11
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1263; C22B34/1268; C22B34/1277
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |