US3597190A
Expired / Lapsed
US
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Process for the continuous digestion of titanium ore by means of hydrochloric acid
Assignee: Titan GmbH
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Filing: 1969-04-14
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Granted: 1971-08-03
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Expires: 1989-04-14
Abstract
Abstract THE INVENTION IS CONCERNED WITH A CO-CURRENT PROCESS FOR THE CONTINUOUS DIGESTION OF TITANIUM ORES, ESPECIALLY ILMENITE ORES, USING CONCENTRATED HYDROCHLORIC ACID AT ELEVATED TEMPERATURES AND AT ATMOSPHERIC PRESSURE.
Inventors
- 👤 Helmut Grohmann
- 👤 Achim Kulling
- 👤 Helmut Steinhausen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:46
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/053; C01G23/0536; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1236; C22B34/124; C22B34/1245; C01P; C01P2004/00; C01P2004/10; C01P2004/30; C01P2006/00; C01P2006/60; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/01
Claims Analysis
Total Claims: 0
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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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |