US2634280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the extraction of rhenium and analogous elements
Assignee: S I F E M
•
Filing: 1948-05-25
•
Granted: 1953-04-07
•
Expires: 1968-05-25
Abstract
No abstract record available.
Inventors
- 👤 Tribalat Suzanne Mar Francoise
- 👤 Bertolus Marcel Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:13
CPC Classifications
C; C01; C01G; C01G47/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR THE EXTRACTION OF AN ELEMENT BELONGING TO COLUMN V11 OF THE PERIODIC CLASSIFICATION (F,CL,BR,I,MN,TE,RE,ASTATINE, NEPTUNIUM) FROM RAW MATERIALS MATERIALS CONTAINING SAID ELEMENTS EVEN AS TRACES, COMPRISING ATTACKING SAID RAW MATERIAL BY A CHEMICAL REAGENT ABLE TO FORM AN AQUEOUS SOLUTION CONTAINING SAID ELEMENTS IN THE FORM OF ANIONS, ADDING TO SAID AQUEOUS SOLUTION AN ORGANIC REAGENT CONSISTING OF TETRAPHENYLARSONIUM CHLORIDE, THEN ADDING AN ORGANIC SOLVENT FOR SELECTIVELY DISSOLVING THE COMPOUND FORMED BY THE ANIONS OF THE ELEMENT TO BE EXTRACTED AND THE TETRAPHENYLARSONIUM CATIONS, AND SEPARATING THE TWO LIQUORS AFTER SAID COMPOUND HAS BEEN EXTRACTED BY THE SOLVENT FROM SAID AQUEOUS SOLUTION.
Claim 2
Dependent Claim
105 words
A PROCESS FOR THE EXTRACTION OF AN ELEMENT BELONGING TO COLUMN V11 OF THE PERIODIC CLASSIFICATION (F,CL,BR,I,MN,TE,RE,ASTATINE, NEPTUNIUM) FROM RAW MATERIALS MATERIALS CONTAINING SAID ELEMENTS EVEN AS TRACES, COMPRISING ATTACKING SAID RAW MATERIAL BY A CHEMICAL REAGENT ABLE TO FORM AN AQUEOUS SOLUTION CONTAINING SAID ELEMENTS IN THE FORM OF ANIONS, ADDING TO SAID AQUEOUS SOLUTION AN ORGANIC REAGENT CONSISTING OF TETRAPHENYLARSONIUM CHLORIDE, THEN ADDING AN ORGANIC SOLVENT FOR SELECTIVELY DISSOLVING THE COMPOUND FORMED BY THE ANIONS OF THE ELEMENT TO BE EXTRACTED AND THE TETRAPHENYLARSONIUM CATIONS, AND SEPARATING THE TWO LIQUORS AFTER SAID COMPOUND HAS BEEN EXTRACTED BY THE SOLVENT FROM SAID AQUEOUS SOLUTION.
References Cited (Backward Citations)
USRE15931E
Cited
US714914A
Cited
US1099388A
Cited
US1238279A
Cited
US1290181A
Cited
US2048112A
Cited
US2230322A
Cited
US2227833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |