US2859173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating a petroleum fraction with molecular sieve adsorbents
Assignee: Texaco Inc
•
Filing: 1955-01-25
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Granted: 1958-11-04
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Expires: 1975-01-25
Abstract
No abstract record available.
Inventors
- 👤 Howard V Hess
- 👤 Edward R Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:15
CPC Classifications
C; C10; C10G; C10G61/00; C10G61/02; C10G61/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A METHOD OF TREATING A PETROLEUM FRACTION HAVING AN END POINT IN THE RANGE 100-425*F. AND CONTAINING A SUBSTANTIAL AMOUNT OF C4 AND C5 HYDROCARBONS WHICH COMPRISES FRACTIONATING SAID PETROLEUM FRACTION TO REMOVE OVERHEAD SUBSTANTIALLY ALL OF THE C4 AND C5 HYDROCARBONS, SUBJECTING THE REMAINING PETROLEUM FRACTION TO CONTACT WITH A MOLECULAR SIEVE ALUMINO-SILICATE SELECTIVE ADSORBENT WHICH SELECTIVELY ADSORBS STRAIGHT CHAIN HYDROCARBONS TO THE SUBSTANTIAL EXCLUSION OF NON-STRAIGHT CHAIN HYDROCARBONS TO ADBORB STRAIGHT CHAIN HYDROCARBONS FROM SAID REMAINING PETROLEUM FRACTION, RECOVERING FROM THE AFORESAID ADSORPTION OPERATION A TREATED FRACTION SUBSTANTIALLY FREE OF STRAIGHT CHAIN HYDROCARBONS AND BLENDING WITH SAID RECOVERED TREATED FRACTION THE C4 AND C5 HYDROCARBONS SEPARATED OVERHEAD IN THE AFORESAID FRACTIONATION OPERATION.
Claim 2
Independent Claim
114 words
A METHOD OF TREATING A PETROLEUM FRACTION HAVING AN END POINT IN THE RANGE 100-425*F. AND CONTAINING A SUBSTANTIAL AMOUNT OF C4 AND C5 HYDROCARBONS WHICH COMPRISES FRACTIONATING SAID PETROLEUM FRACTION TO REMOVE OVERHEAD SUBSTANTIALLY ALL OF THE C4 AND C5 HYDROCARBONS, SUBJECTING THE REMAINING PETROLEUM FRACTION TO CONTACT WITH A MOLECULAR SIEVE ALUMINO-SILICATE SELECTIVE ADSORBENT WHICH SELECTIVELY ADSORBS STRAIGHT CHAIN HYDROCARBONS TO THE SUBSTANTIAL EXCLUSION OF NON-STRAIGHT CHAIN HYDROCARBONS TO ADBORB STRAIGHT CHAIN HYDROCARBONS FROM SAID REMAINING PETROLEUM FRACTION, RECOVERING FROM THE AFORESAID ADSORPTION OPERATION A TREATED FRACTION SUBSTANTIALLY FREE OF STRAIGHT CHAIN HYDROCARBONS AND BLENDING WITH SAID RECOVERED TREATED FRACTION THE C4 AND C5 HYDROCARBONS SEPARATED OVERHEAD IN THE AFORESAID FRACTIONATION OPERATION.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |