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Patent US3130243A successfully refreshed from Google Patents.
US3130243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of hydrocarbons by silver dialkyl phosphates
Assignee: Shell USA Inc
•
Filing: 1962-08-21
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Granted: 1964-04-21
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Expires: 1982-08-21
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Dunn
- 👤 Friedrich G Helfferich
- 👤 Robert E Meeker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:33
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A METHOD FOR THE SELECTIVE EXTRACTION OF A NONPARAFFIN HYDROCARBON FROM A FLUID MIXTURE THEREOF WITH ANOTHER HYDROCARBON WHICH COMPRISES CONTACTING THE MIXTURE OF HYDROCARBONS IN FLUID STATE WITH A SILVER DIALKYL PHOSPHATE TO SELECTIVELY FROM A COMPLEX BETWEEN THE NONPARAFFIN HYDROCARBON AND THE SILVER DIALKYL PHOSPHATE.
Claim 2
Independent Claim
47 words
A METHOD FOR THE SELECTIVE EXTRACTION OF A NONPARAFFIN HYDROCARBON FROM A FLUID MIXTURE THEREOF WITH ANOTHER HYDROCARBON WHICH COMPRISES CONTACTING THE MIXTURE OF HYDROCARBONS IN FLUID STATE WITH A SILVER DIALKYL PHOSPHATE TO SELECTIVELY FROM A COMPLEX BETWEEN THE NONPARAFFIN HYDROCARBON AND THE SILVER DIALKYL PHOSPHATE.
References Cited (Backward Citations)
US2338600A
Cited
US2378216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |