Patent US2889893A successfully refreshed from Google Patents.
US2889893A
Expired / Lapsed
US
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Adsorption separation process
Assignee: Texaco Inc
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Filing: 1955-03-28
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Granted: 1959-06-09
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Expires: 1975-03-28
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 23:56
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13; C10; C10G; C10G25/00; C10G25/02; C10G25/03; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A METHOD OF FRACTIONATING A MIXTURE OF STRAIGHT CHAIN HYDROCARBONS COMPRISING STRAIGHT CHAIN HYDROCARBONS CONTAINING THE SAME NUMBER OF CARBON ATOMS PER MOLECULE WHICH COMPRISES CONTACTING SAID MIXTURE WITH AN ALUMINO-SILICATE MOLECULAR SIEVE TYPE SOLID SELECTIVE ADSORBENT MADE UP OF POROUS CRYSTALS WHICH POSSESS PORES OF UNIFORM MOLECULAR DIMENSION, ABOUT 5 ANGSTROM UNITS, SUFFICIENTLY LARGE TO PERMIT THE ENTRY OF STRAIGHT CHAIN HYDROCARBONS AND WHICH ADSORBENT SELECTIVELY ADSORBS STRAIGHT CHAIN HYDROCARBONS TO THE SUBSTANTIAL EXCLUSION OF NON-STRAIGHT CHAIN HYDROCARBONS, AT A CONTACTING TEMPERATURE ABOVE THE CRITICAL TEMPERATURE OF ONE OF SAID STRAIGHT CHAIN HYDROCARBONS IN SAID MIXTURE TO ADSORB THOSE STRAIGHT CHAIN HYDROCARBONS IN SAID MIXTURE HAVING A CRITICAL TEMPERATURE GREATER THAN SAID CONTACTING TEMPERATURE TO THE SUBSTANTIAL EXCLUSION OF THOSE STRAIGHT CHAIN HYDROCARBONS HAVING A CRITICAL TEMPERATURE BELOW SAID CONTACTING TEMPERATURE.
Claim 2
Independent Claim
132 words
A METHOD OF FRACTIONATING A MIXTURE OF STRAIGHT CHAIN HYDROCARBONS COMPRISING STRAIGHT CHAIN HYDROCARBONS CONTAINING THE SAME NUMBER OF CARBON ATOMS PER MOLECULE WHICH COMPRISES CONTACTING SAID MIXTURE WITH AN ALUMINO-SILICATE MOLECULAR SIEVE TYPE SOLID SELECTIVE ADSORBENT MADE UP OF POROUS CRYSTALS WHICH POSSESS PORES OF UNIFORM MOLECULAR DIMENSION, ABOUT 5 ANGSTROM UNITS, SUFFICIENTLY LARGE TO PERMIT THE ENTRY OF STRAIGHT CHAIN HYDROCARBONS AND WHICH ADSORBENT SELECTIVELY ADSORBS STRAIGHT CHAIN HYDROCARBONS TO THE SUBSTANTIAL EXCLUSION OF NON-STRAIGHT CHAIN HYDROCARBONS, AT A CONTACTING TEMPERATURE ABOVE THE CRITICAL TEMPERATURE OF ONE OF SAID STRAIGHT CHAIN HYDROCARBONS IN SAID MIXTURE TO ADSORB THOSE STRAIGHT CHAIN HYDROCARBONS IN SAID MIXTURE HAVING A CRITICAL TEMPERATURE GREATER THAN SAID CONTACTING TEMPERATURE TO THE SUBSTANTIAL EXCLUSION OF THOSE STRAIGHT CHAIN HYDROCARBONS HAVING A CRITICAL TEMPERATURE BELOW SAID CONTACTING TEMPERATURE.
References Cited (Backward Citations)
US2306610A
Cited
US2609887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |