US2714940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of acetylenes
Assignee: EIDP Inc
•
Filing: 1952-07-12
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Granted: 1955-08-09
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Expires: 1972-07-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Milligan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:52
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE PROCESS OF RECOVERING ACETYLENE FROM A CRUDE GAS OBTAINED BY THE PYROLYSIS OF A HYDROCARBON WHICH COMPRISES PASSING SAID GAS THROUGH A SUFFICIENT AMOUNT OF DIMETHYLFORMAMIDE TO REMOVE ANY DIACETYLENE BUT IN INSUFFICIENT AMOUNT TO REMOVE A SUBSTANTIAL QUANTITY OF ACETYLENE, PASSING SAID GAS THROUGH A SECOND QUANTITY OF DIMETHYLFORMAMIDE OF SUFFICIENT AMOUT TO ABSORB NEARLY ALL OF THE ACETYLENE FROM SAID GAS, SELECTIVELY STRIPPING ANY ETHYLENE OR CARBON DIOXIDE FROM SAID SECOND QUANTITY OF DIMETHYLFORMAMIDE, SEPARATING THE REMAINING ABSORBED GAS FROM SAID DIMETHYLFORMAMIDE, AND PASSING SUCH SEPARATED GAS THROUGH A THIRD QUANTITY OF DIMETHYLFORMAMIDE OF SUFFICIENT AMOUNT TO ABSORB NEARLY ALL OF THE METHYLACETYLENE THEREFROM AND WITHDRAWING, AS PRODUCT, THE ACETYLENE PASSING FROM SAID THIRD QUANTITY OF DIMETHYLFORMAMIDE.
Claim 2
Dependent Claim
120 words
THE PROCESS OF RECOVERING ACETYLENE FROM A CRUDE GAS OBTAINED BY THE PYROLYSIS OF A HYDROCARBON WHICH COMPRISES PASSING SAID GAS THROUGH A SUFFICIENT AMOUNT OF DIMETHYLFORMAMIDE TO REMOVE ANY DIACETYLENE BUT IN INSUFFICIENT AMOUNT TO REMOVE A SUBSTANTIAL QUANTITY OF ACETYLENE, PASSING SAID GAS THROUGH A SECOND QUANTITY OF DIMETHYLFORMAMIDE OF SUFFICIENT AMOUT TO ABSORB NEARLY ALL OF THE ACETYLENE FROM SAID GAS, SELECTIVELY STRIPPING ANY ETHYLENE OR CARBON DIOXIDE FROM SAID SECOND QUANTITY OF DIMETHYLFORMAMIDE, SEPARATING THE REMAINING ABSORBED GAS FROM SAID DIMETHYLFORMAMIDE, AND PASSING SUCH SEPARATED GAS THROUGH A THIRD QUANTITY OF DIMETHYLFORMAMIDE OF SUFFICIENT AMOUNT TO ABSORB NEARLY ALL OF THE METHYLACETYLENE THEREFROM AND WITHDRAWING, AS PRODUCT, THE ACETYLENE PASSING FROM SAID THIRD QUANTITY OF DIMETHYLFORMAMIDE.
References Cited (Backward Citations)
US2146448A
Cited
US2217429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-08 | 1959-02-07 | 1959-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-08 | 1963-02-07 | 1963-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-08 | 1967-02-07 | 1967-08-09 | $7700.00 | Window Closed / Lapsed |