Patent US2663673A successfully refreshed from Google Patents.
US2663673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desulfurization of petroleum oils
Assignee: Standard Oil Co
•
Filing: 1951-05-26
•
Granted: 1953-12-22
•
Expires: 1971-05-26
Abstract
No abstract record available.
Inventors
- 👤 Mathew L Kalinowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:38
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR REDUCING THE SULFUR CONTENT OF A SULFUR-CONTAINING PETROLEUM NAPHTHA, WHICH PROCESS COMPRISES CONTACTING SAID NAPHTHA IN THE LIQUID STATE AT A TEMPERATURE BELOW ABOUT 110* F. WITH A SOLID ASPHALTENE IN A WEIGHT RATIO OF NAPHTHA-TO-ASPHALTENES FROM ABOUT 1 TO ABOUT 6, AND SEPARATING SOLID ASPHALTENES FROM THE TREATED NAPHTHA, WHEREIN SAID ASPHALTENES ARE OBTAINED BY PRECIPITATION FROM A MEMBER OF THE CLASS CONSISTING OF REDUCED CRUDE, TARS AND BITUMENS BY TREATING THEREOF WITH AN EXCESS OF A LIGHT PARAFFINIC PRECIPITATION AGENT CONTAINING FROM 5 TO 6 CARBON ATOMS.
Claim 2
Dependent Claim
92 words
A PROCESS FOR REDUCING THE SULFUR CONTENT OF A SULFUR-CONTAINING PETROLEUM NAPHTHA, WHICH PROCESS COMPRISES CONTACTING SAID NAPHTHA IN THE LIQUID STATE AT A TEMPERATURE BELOW ABOUT 110* F. WITH A SOLID ASPHALTENE IN A WEIGHT RATIO OF NAPHTHA-TO-ASPHALTENES FROM ABOUT 1 TO ABOUT 6, AND SEPARATING SOLID ASPHALTENES FROM THE TREATED NAPHTHA, WHEREIN SAID ASPHALTENES ARE OBTAINED BY PRECIPITATION FROM A MEMBER OF THE CLASS CONSISTING OF REDUCED CRUDE, TARS AND BITUMENS BY TREATING THEREOF WITH AN EXCESS OF A LIGHT PARAFFINIC PRECIPITATION AGENT CONTAINING FROM 5 TO 6 CARBON ATOMS.
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) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |