US2632778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating naphthenes
Assignee: —
•
Filing: —
•
Granted: 1953-03-24
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Expires: 1970-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:22
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C10; C10G; C10G25/00; C10G25/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS FOR SEPARATING NAPHTHENES FROM PARAFFIN HYDROCARBONS WHICH COMPRISES CONTACTING AT ROOM TEMPERATURE A HYDROCARBON FEEDSTOCK BOILING FROM 115* TO 250* F. CONTAINING ONLY PARAFFINS AND NAPHTHENES WITH SILICA GEL WHICH HAS BEEN PREVIOUSLY CONTACTED WITH A LIQUID SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL, MOMO-METHYL ETHER OF DIETHYLENE GLYCOL, ANILINE ACETONE, ISOPROPYL ALCOHOL, DIMETHOXYTETRAETHYLENE GLYCOL AND METHOXYTRIGYLCOL.
Claim 2
Dependent Claim
60 words
A PROCESS FOR SEPARATING NAPHTHENES FROM PARAFFIN HYDROCARBONS WHICH COMPRISES CONTACTING AT ROOM TEMPERATURE A HYDROCARBON FEEDSTOCK BOILING FROM 115* TO 250* F. CONTAINING ONLY PARAFFINS AND NAPHTHENES WITH SILICA GEL WHICH HAS BEEN PREVIOUSLY CONTACTED WITH A LIQUID SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL, MOMO-METHYL ETHER OF DIETHYLENE GLYCOL, ANILINE ACETONE, ISOPROPYL ALCOHOL, DIMETHOXYTETRAETHYLENE GLYCOL AND METHOXYTRIGYLCOL.
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) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |