US3565700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing and purifying pure dry fluoride materials
Assignee: United States Department of the Navy
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Filing: 1968-12-10
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Granted: 1971-02-23
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Expires: 1988-12-10
Abstract
Abstract METHOD FOR PREPARING AND PURIFYING ALKALI METAL AND ALKALINE EARTH METAL SALT COMPOUNDS AND MIXTURES THEREOF WHICH INVOLVE THE MIXING AND TREATMENT OF THE MATERIAL IN A QUARTZ REACTION VESSEL WITH FLUORINE GAS AT AN ELEVATED TEMPERATURE. D R A W I N G
Inventors
- 👤 Charles B Root
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:33
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/14; C01G; C01G1/00; C01G1/06
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |