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US3619129A
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Process for the manufacture of anhydrous refractory metal iodides
Assignee: GTE Sylvania Inc
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Filing: 1970-01-13
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Granted: 1971-11-09
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Expires: 1990-01-13
Abstract
Abstract Anhydrous refractory metal iodides can be prepared by reacting an alkyl iodide and a refractory metal chloride under controlled temperature conditions. After digesting for at least about 5 minutes, the refractory metal iodide is isolated and dried under a nonoxidizing atmosphere.
Inventors
- 👤 Vincent Chiola
- 👤 Clarence D Vanderpool
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:46
CPC Classifications
C; C01; C01G; C01G35/00; C01G33/00; C01G39/00; C01G39/04; C01G41/00; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
18 words
A process according to claim 1, wherein an alkyl chloride is formed and thereafter recovered as a byproduct.
Claim 2
Dependent Claim
22 words
A process according to claim 1 wherein said temperature of resulting reaction medium is from about 50* C. to about 120* C.
Claim 3
Dependent Claim
24 words
A process according to claim 3, wherein said alkyl iodide is selected from the group consisting of methyl iodide, ethyl iodide, and mixtures thereof.
Claim 4
Dependent Claim
25 words
A process according to claim 4, wherein said refractory metal is tungsten and said digesting time is from about 10 minutes to about 45 minutes.
Claim 5
Dependent Claim
25 words
A process according to claim 4, wherein said refractory metal is molybdenum and said digesting time is from about 24 hours to about 96 hours.
Claim 6
Dependent Claim
25 words
A process according to claim 3, wherein said refractory metal is niobium and said digesting time is from about 12 hours to about 36 hours.
Claim 7
Dependent Claim
25 words
A process according to claim 3, wherein said refractory metal is tantalum and said digesting time is from about 12 hours to about 36 hours.
References Cited (Backward Citations)
CA451379A
Cited
US1891415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |