US3192011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing high purity rhenium compounds
Assignee: Chase Brass and Copper Co Inc
•
Filing: 1963-08-07
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Granted: 1965-06-29
•
Expires: 1983-08-07
Abstract
No abstract record available.
Inventors
- 👤 Jr James Cooper
- 👤 Joseph J Aldrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:35
CPC Classifications
C; C22; C22B; C22B61/00; C01; C01G; C01G47/00; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE PROCESS OF TREATING IMPURE PERRHENIC ACID SOLUTION TO REMOVE RESIDUAL EXTRANEOUS METAL CATION CONTAMINANTS AND ESPECIALLY ALKALI METAL ION CONTAMINANTS, WHICH COMPRISES CONTACTING A SOLUTION CONSISTING ESSENTIALLY OF IMPURE PERRHENIC ACID CONTAINING FROM ABOUT 20 TO 200 GRAMS OF RHENIUM PER LITER AND HAVING A SOLUTION PH OF LESS THAN 1.0, WITH CATIONIC EXCHANGE RESIN TO EFFECT ABSORBTION THEREON OF SAID CONTAMINANTS, AND WITHDRAWING PURIFIED PERRHENIC ACID SOLUTION AS THE EFFLUENT FROM SAID EXCHANGE RESIN.
Claim 2
Dependent Claim
76 words
THE PROCESS OF TREATING IMPURE PERRHENIC ACID SOLUTION TO REMOVE RESIDUAL EXTRANEOUS METAL CATION CONTAMINANTS AND ESPECIALLY ALKALI METAL ION CONTAMINANTS, WHICH COMPRISES CONTACTING A SOLUTION CONSISTING ESSENTIALLY OF IMPURE PERRHENIC ACID CONTAINING FROM ABOUT 20 TO 200 GRAMS OF RHENIUM PER LITER AND HAVING A SOLUTION PH OF LESS THAN 1.0, WITH CATIONIC EXCHANGE RESIN TO EFFECT ABSORBTION THEREON OF SAID CONTAMINANTS, AND WITHDRAWING PURIFIED PERRHENIC ACID SOLUTION AS THE EFFLUENT FROM SAID EXCHANGE RESIN.
References Cited (Backward Citations)
US2876065A
Cited
US2945745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |