US3814799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purifying gases containing mercury or mercury and oxygen as impurities
Assignee: BASF SE
•
Filing: 1972-01-14
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Granted: 1974-06-04
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Expires: 1992-01-14
Abstract
Abstract IMPURITIES CONSISTING OF MERCURY AND/OR OXYGEN ARE REMOVED FROM GASES BYMEANS OF AN ABSORBENT SUPPORTED ON A CARRIER. THE ABSORBENT USED IS COPPER, AND THE CARRIER IS ALUMINUM OXIDE. THE ALUMINUM OXIDE HAS AN INTERNAL SURFACE AREA OF FROM 100 TO300 M.2 G., A PORE VOLUME OF FROM 0.5 TO 0.8 CM.3 G. AND AN AVERAGE PORE DIAMETR OF FROM 40 TO 80 A.
Inventors
- 👤 E Wygasch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:30
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D2253/00; B01D2253/10; B01D2253/104; B01D2253/30; B01D2253/302; B01D2253/306; B01D2253/308; B01D2256/00; B01D2256/16; B01D2257/00; B01D2257/10; B01D2257/104; B01D2257/60; B01D2257/602; B01D2259/00; B01D2259/40; B01D2259/402
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |