US2561822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of olefins
Assignee: Pure Oil Co
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Filing: 1946-12-28
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Granted: 1951-07-24
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Expires: 1966-12-28
Abstract
No abstract record available.
Inventors
- 👤 Savoy Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:43
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD OF SEPARATING OLEFINS FROM OLEFINCONTAINING GAS MIXTURES WHICH COMPRISES, CONTACTINGS THE MIXTURE WITH AN OLEFIN ABSORBENT SOLUTION COMPRISING A CUPROUS SALT DISSOLVED IN AN ANHYDROUS ACIDIFIED SOLVENT CONSISTING OF AN ALKYLOLAMINE AND A LOW-BOILING MONO-HYDRIC ALCOHOL, SAID SALT BEING PRESENT IN AMOUNT SUBSTANTIALLY IN EXCESS OF THE AMOUNT SOLUBLE IN THE UNACIDIFIED SOLVENT.
Claim 2
Independent Claim
55 words
A METHOD OF SEPARATING OLEFINS FROM OLEFINCONTAINING GAS MIXTURES WHICH COMPRISES, CONTACTINGS THE MIXTURE WITH AN OLEFIN ABSORBENT SOLUTION COMPRISING A CUPROUS SALT DISSOLVED IN AN ANHYDROUS ACIDIFIED SOLVENT CONSISTING OF AN ALKYLOLAMINE AND A LOW-BOILING MONO-HYDRIC ALCOHOL, SAID SALT BEING PRESENT IN AMOUNT SUBSTANTIALLY IN EXCESS OF THE AMOUNT SOLUBLE IN THE UNACIDIFIED SOLVENT.
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) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |