Patent US2639216A successfully refreshed from Google Patents.
US2639216A
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Removal of halide ions from chromate liquors
Assignee: Diamond Shamrock Corp
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Filing: 1949-02-11
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Granted: 1953-05-19
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Expires: 1969-02-11
Abstract
No abstract record available.
Inventors
- 👤 Robert G Banner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:46
CPC Classifications
C; C01; C01G; C01G37/00; C01G37/14; C22; C22B; C22B34/00; C22B34/30; C22B34/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF OBTAINING HALIDE-FREE BICHROMATE LIQUORS, WHICH INCLUDES ROASTING CHROME ORE CONTAINING HALIDE COMPOUNDS UNDER ALKALINE CONDITIONS, LEACHING SAID ROAST TO OBTAIN A HALIDECONTAINING LIQUOR HAVING A PH BELOW 9, ADDING A SOURCE OF SILVER IONS THERETO IN AN AMOUNT SLIGHTLY LESS THAN THE STOICHIOMETRIC EQUIVALENT OF HALIDE ION PRESENT IN SAID LIQUOR TO PRECIPITATE SILVER HALIDE, SEPARATING SAID SILVER HALIDE, RECOVERING SAID HALIDE-FREED BICHROMATE LIQUOR, CONVERTING THE SILVER OF SAID SILVER HALIDE PRECIPITATE TO A
Claim 2
Independent Claim
77 words
THE METHOD OF OBTAINING HALIDE-FREE BICHROMATE LIQUORS, WHICH INCLUDES ROASTING CHROME ORE CONTAINING HALIDE COMPOUNDS UNDER ALKALINE CONDITIONS, LEACHING SAID ROAST TO OBTAIN A HALIDECONTAINING LIQUOR HAVING A PH BELOW 9, ADDING A SOURCE OF SILVER IONS THERETO IN AN AMOUNT SLIGHTLY LESS THAN THE STOICHIOMETRIC EQUIVALENT OF HALIDE ION PRESENT IN SAID LIQUOR TO PRECIPITATE SILVER HALIDE, SEPARATING SAID SILVER HALIDE, RECOVERING SAID HALIDE-FREED BICHROMATE LIQUOR, CONVERTING THE SILVER OF SAID SILVER HALIDE PRECIPITATE TO A
References Cited (Backward Citations)
US1446405A
Cited
US2416551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |