Patent US3704113A successfully refreshed from Google Patents.
US3704113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chloridizing alumina-containing ore
Assignee: Ethyl Corp
•
Filing: 1970-05-28
•
Granted: 1972-11-28
•
Expires: 1990-05-28
Abstract
Abstract A METHOD OF BENEFICATING OR UPGRADING ALUMINA-SILICA OR ALUMINUM-SILICATE ORES, ESPECIALLY NATURAL CLAYS CONTAINING SUBSTANTIAL AMOUNTS OF MINERALS SUCH AS KYANITE, DIASPORE AND THE LIKE, WHEREIN THE ORE IS HEATED TO A RELATIVELY HIGH TEMPERATURE AND TREATED WITH CHLORINE.
Inventors
- 👤 Clarence L Hildreth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:41
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/08
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |