Patent US2747962A successfully refreshed from Google Patents.
US2747962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of other acid gases from mixtures containing carbon dioxide
Assignee: Dow Chemical Co
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Filing: 1953-05-14
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Granted: 1956-05-29
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Expires: 1973-05-14
Abstract
No abstract record available.
Inventors
- 👤 Robert G Heitz
- 👤 Albert L Rocklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:53
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD FOR EFFECTING SUBSTANTIAL SEPARATION OF HYDROGEN CYANIDE FROM CARBON DIOXIDE IN GAS MIXTURES IN WHICH THESE ARE THE PRINCIPAL ACIDIC CONSTITUENTS WHICH COMPRISES BRINGING A RAPIDLY MOVING STREAM OF SUCH A GAS MIXTURE INTO CONTACT WITH A RELATIVELY SLOWLY MOVING STREAM OF AN AQUEOUS SOLUTION OF A MATERIAL FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDE AND MIXTURES THEREOF WITH ALKALI METAL CYANIDE, AND MAINTAINING SAID CONTACT ONLY FOR A PERIOD OF LESS THAN 0.05 SECOND.
Claim 2
Independent Claim
78 words
A METHOD FOR EFFECTING SUBSTANTIAL SEPARATION OF HYDROGEN CYANIDE FROM CARBON DIOXIDE IN GAS MIXTURES IN WHICH THESE ARE THE PRINCIPAL ACIDIC CONSTITUENTS WHICH COMPRISES BRINGING A RAPIDLY MOVING STREAM OF SUCH A GAS MIXTURE INTO CONTACT WITH A RELATIVELY SLOWLY MOVING STREAM OF AN AQUEOUS SOLUTION OF A MATERIAL FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDE AND MIXTURES THEREOF WITH ALKALI METAL CYANIDE, AND MAINTAINING SAID CONTACT ONLY FOR A PERIOD OF LESS THAN 0.05 SECOND.
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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |