Patent US2685346A successfully refreshed from Google Patents.
US2685346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal vapor separation
Assignee: EIDP Inc
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Filing: 1951-06-27
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Granted: 1954-08-03
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Expires: 1971-06-27
Abstract
No abstract record available.
Inventors
- 👤 Alden J Deyrup
- 👤 James J Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:51
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1493
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
IN THE PROCESS OF PREPARING METALLIC SODIUM BY THE REACTION BETWEEN SODIUM CARBONATE AND CARBON AT AN ELEVATED TEMPERATURE, THE STEPS OF ABSORBING SODIUM FROM THE VAPORS PRODUCED BY SAID REACTION IN SMALL DROPLETS OF TIN HELD
Claim 2
Dependent Claim
37 words
IN THE PROCESS OF PREPARING METALLIC SODIUM BY THE REACTION BETWEEN SODIUM CARBONATE AND CARBON AT AN ELEVATED TEMPERATURE, THE STEPS OF ABSORBING SODIUM FROM THE VAPORS PRODUCED BY SAID REACTION IN SMALL DROPLETS OF TIN HELD
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |