US2856259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for purifying air contaminated by acid or nitrous impurities
Assignee: Colasit AG
•
Filing: 1950-12-02
•
Granted: 1958-10-14
•
Expires: 1970-12-02
Abstract
No abstract record available.
Inventors
- 👤 Bollinger Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:13
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
THE PROCESS OF FREEING AIR FROM ACID AND NITROGENOUS GASES AND VAPORS CONTAMINATING IT WHICH COMPRISES ADMIXING WITH THE AIR AN AQUEOUS SOLUTION OF A SUBSTANCE OF BASIC REACTION IN THE FORM OF A MIST, CONDUCTING THE MIXTURE THUS FORMED THROUGH TWO LAYERS, ARRANGED IN SERIES, OF GRANDULAR LARGE-SURFACE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CARBON, PUMICE STONE, BURNT POROUS CLAY AND ABESTOS, SAID MATERIAL BEING IMPREGNATED WITH AN INSOLUBLE COMPOUND OF A METAL SELECTED FROM THE
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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) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |