Patent US3054838A successfully refreshed from Google Patents.
US3054838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for separating n-hydrocarbons using molecular sieves
Assignee: California Research LLC
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Filing: 1958-09-08
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Granted: 1962-09-18
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Expires: 1978-09-08
Abstract
No abstract record available.
Inventors
- 👤 Clark J Egan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:12
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; C10G25/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN A PROCESS FOR SEPARATING NORMAL STRAIGHT CHAIN HYDROCARBONS SELECTED FROM THE GROUP CONSISTING OF STRAIGHT CHAIN PARAFFINS AND STRAIGHT CHAIN OLEFINS FROM A HYDROCARBON FEED MIXTURE CONTAINING SAID HYDROCARBONS ALONG WITH NON-STRAIGHT CHAIN HYDROCARBONS, THE STEPS COMPRISING PASSING SAID MIXTURE IN LIQUID PHASE THROUGH A BED OF MOLECULAR SIEVE ADSORBENT ADAPTED TO SELECTIVELY ADSORB SAID STRAIGHT CHAIN HYDROCARBONS; THEREAFTER STRIPPING ADSORBED AND NON-ADSORBED FEED HYDROCARBONS FROM THE BED BY PASSING THERETHROUGH AN EXCESS OF A STRIPPANT LIQUID CONSISTING ESSENTIALLY OF STRAIGHT CHAIN HYDROCARBONS WHICH HAVE THE SAME DEGREE OF UNSATURATION PER MOLECULE AS THE ADSORBED COMPONENT OF THE FEED AND ARE HIGHER BOILING THAN ANY COMPONENT OF THE FEED; AND DISPLACING THE STRIPPANT LIQUID FROM THE BED BY RESUMING PASSAGE
Claim 2
Dependent Claim
121 words
IN A PROCESS FOR SEPARATING NORMAL STRAIGHT CHAIN HYDROCARBONS SELECTED FROM THE GROUP CONSISTING OF STRAIGHT CHAIN PARAFFINS AND STRAIGHT CHAIN OLEFINS FROM A HYDROCARBON FEED MIXTURE CONTAINING SAID HYDROCARBONS ALONG WITH NON-STRAIGHT CHAIN HYDROCARBONS, THE STEPS COMPRISING PASSING SAID MIXTURE IN LIQUID PHASE THROUGH A BED OF MOLECULAR SIEVE ADSORBENT ADAPTED TO SELECTIVELY ADSORB SAID STRAIGHT CHAIN HYDROCARBONS; THEREAFTER STRIPPING ADSORBED AND NON-ADSORBED FEED HYDROCARBONS FROM THE BED BY PASSING THERETHROUGH AN EXCESS OF A STRIPPANT LIQUID CONSISTING ESSENTIALLY OF STRAIGHT CHAIN HYDROCARBONS WHICH HAVE THE SAME DEGREE OF UNSATURATION PER MOLECULE AS THE ADSORBED COMPONENT OF THE FEED AND ARE HIGHER BOILING THAN ANY COMPONENT OF THE FEED; AND DISPLACING THE STRIPPANT LIQUID FROM THE BED BY RESUMING PASSAGE
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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) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |