Patent US2886610A successfully refreshed from Google Patents.
US2886610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent recovery system
Assignee: American Oil Co
•
Filing: 1954-04-28
•
Granted: 1959-05-12
•
Expires: 1974-04-28
Abstract
No abstract record available.
Inventors
- 👤 Carl C Georgian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:22
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
THE PROCESS FOR THE RECOVERY OF AROMATIC HYDROCARBONS, WHICH PROCESS COMPRISES(1)CONTACTING A LIQUID PETROLEUM NAPHTHA CONTAINING APPRECIABLE AMOUNTS OF AROMATIC HYDROCARBONS, WITH A LIQUID GLYCOL SOLVENT UNDER CONDITIONS TO FORM AN EXTRACT PHASE COMPRISING ESSENTIALLY SOLVENT, AND EXTRACT HYDROCARBONS, WHEREIN THE AROMATIC CONTENT IS MARKEDLY GREATER THAN THE AROMATIC CONTENT OF SAID NAPHTHA, AND A RAFFINATE PHASE(2) SEPARATING SAID EXTRACT PHASE FROM SAID RAFFINATE PHASE(3) DISTILLING EXTRACT HYDROCARBONS FROM SAID EXTRACT PHASE UNDER CONDITIONS WHEREIN A MIXTURE OF EXTRACT HYDROCARBON AND SOLVENT VAPORS ARE CONTACTED BY A LIQUID AQUEOUS STREAM CONSISTING OF WATER AND NOT MORE THAN A MINOR AMOUNT OF GLYCOL IS AN AMOUNT AT LEAST SUFFICIENT TO REMOVE FROM
Claim 2
Dependent Claim
111 words
THE PROCESS FOR THE RECOVERY OF AROMATIC HYDROCARBONS, WHICH PROCESS COMPRISES(1)CONTACTING A LIQUID PETROLEUM NAPHTHA CONTAINING APPRECIABLE AMOUNTS OF AROMATIC HYDROCARBONS, WITH A LIQUID GLYCOL SOLVENT UNDER CONDITIONS TO FORM AN EXTRACT PHASE COMPRISING ESSENTIALLY SOLVENT, AND EXTRACT HYDROCARBONS, WHEREIN THE AROMATIC CONTENT IS MARKEDLY GREATER THAN THE AROMATIC CONTENT OF SAID NAPHTHA, AND A RAFFINATE PHASE(2) SEPARATING SAID EXTRACT PHASE FROM SAID RAFFINATE PHASE(3) DISTILLING EXTRACT HYDROCARBONS FROM SAID EXTRACT PHASE UNDER CONDITIONS WHEREIN A MIXTURE OF EXTRACT HYDROCARBON AND SOLVENT VAPORS ARE CONTACTED BY A LIQUID AQUEOUS STREAM CONSISTING OF WATER AND NOT MORE THAN A MINOR AMOUNT OF GLYCOL IS AN AMOUNT AT LEAST SUFFICIENT TO REMOVE FROM
References Cited (Backward Citations)
US2396301A
Cited
US2407820A
Cited
US2444582A
Cited
US2638440A
Cited
US2669541A
Cited
US2635992A
Cited
US2766300A
Cited
US2792332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |