US2594557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of aliphatic hydrocarbons
Assignee: Sunoco Inc
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Filing: 1949-01-05
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Granted: 1952-04-29
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Expires: 1969-01-05
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Hirschler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:21
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS OF SEPARATING TWO PARAFFIN HYDROCARBONS HAVING THE SAME MOLECULAR WEIGHT WHICH COMPRISES SUBJECTING A SATURATE MIXTURE OF SUCH HYDROCARBONS TO TREATMENT IN LIQUID PHASE WITH AN ADSORBENT CONSISTING ESSENTIALLY OF SILICA GEL, THEREBY SELECTIVELY ADSORBING ONE OF SAID HYDROCARBONS, AND SEPARATING FROM THE SILICA GEL A FRACTION CONTAINING THE OTHER HYDROCARBON IN A MORE NEARLY PURE STATE.
Claim 2
Dependent Claim
59 words
A PROCESS OF SEPARATING TWO PARAFFIN HYDROCARBONS HAVING THE SAME MOLECULAR WEIGHT WHICH COMPRISES SUBJECTING A SATURATE MIXTURE OF SUCH HYDROCARBONS TO TREATMENT IN LIQUID PHASE WITH AN ADSORBENT CONSISTING ESSENTIALLY OF SILICA GEL, THEREBY SELECTIVELY ADSORBING ONE OF SAID HYDROCARBONS, AND SEPARATING FROM THE SILICA GEL A FRACTION CONTAINING THE OTHER HYDROCARBON IN A MORE NEARLY PURE STATE.
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) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |