US2801151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialkylammonium dialkylcarbamates as selective solvents for carbon dioxide and hydrogen sulfide
Assignee: Phillips Petroleum Co
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Filing: 1953-11-04
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Granted: 1957-07-30
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Expires: 1973-11-04
Abstract
No abstract record available.
Inventors
- 👤 William T Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:10
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/16; C01; C01B; C01B32/00; C01B32/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A METHOD FOR SEPARATING CARBON DIOXIDE FROM A MIXTURE OF CARBON DIOXIDE IN A SEPERABLE CONCENTRATION WITH AT LEAST ONE OTHER GAS SELECTED FROM THE GROUP OF GASES CONSISTING OF HYDROGEN SULFIDE, METHANE, ACETYLENE, ETHYLENE, ETHANE, CARBON MONOXIDE, HYDROGEN, NITROGEN AND OXYGEN COMPRISING CONTACTING A MIXTURE OF SAID GASES WITH A DIALKYLAMMONIUM DIALKYLCARBAMATE IN THE LIQUID STATE AND HAVING THE FOLLOWING STRUCTURAL FORMULA FIG -01 IN WHICH R1, R2, R3, AND R4, ARE ALKYL GROUPS HAVING FROM I TO 3 CARBON ATOMS PER ALKYL GROUP, REMOVING THE UNDISSOLVED GAS FROM THE RESIDUAL CARBAMATE CONTAINING DISSOLVED CARBEO DIOXIDE AND RECOVERING CARBON DIOXIDE FROM THE RESIDUAL CARBAMATE.
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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |