Patent US3342726A successfully refreshed from Google Patents.
US3342726A
Expired / Lapsed
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Purging and desorbing a molecular sieve with pentane
Assignee: BP PLC
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Filing: 1965-04-22
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Granted: 1967-09-19
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Expires: 1985-04-22
Abstract
No abstract record available.
Inventors
- 👤 Mowll Roger Templeton Lewis
- 👤 Smith Hugh Michael Chaplin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:06
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; C10G25/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A CONTINUOUS CYCLIC, ISOTHERMAL, ISOBARIC AND WHOLLY VAPOR PHASE PROCESS FOR THE SEPARATION OF STRAIGHT-CHAIN HYDROCARBONS FROM PETROLEUM FRACTIONS BOILING IN THE RANGE C9 AND ABOVE, COMPRISING CONTACTING THE FRACTION, DILUTED WITH PENTANE, WITH A 5 A. MOLECULAR SIEVE IN A FIRST STAGE TO ABSORB STRAIGHT-CHAIN HYDROCARBONS; CONTACTING THE SIEVE IN A SECOND STAGE WITH A STREAM OF PENTANE PASSED THROUGH THE SIEVE IN A DIRECTION OPPOSITE TO THAT IN WHICH THE FEED FRACTION WAS PASSED TO REMOVE MATERIAL ABSORBED ON THE SURFACE OF THE SIEVE AND MATERIAL HELD INTERSTITIALLY BETWEEN SIEVE PARTICLES AND RECYCLING THE REMOVED MATERIALS TO THE FEEDSTOCK TO THE ABSORPTION STAGE; AND CONTACTING THE SIEVE IN A THRID STAGE WITH A STREAM
Claim 2
Dependent Claim
116 words
A CONTINUOUS CYCLIC, ISOTHERMAL, ISOBARIC AND WHOLLY VAPOR PHASE PROCESS FOR THE SEPARATION OF STRAIGHT-CHAIN HYDROCARBONS FROM PETROLEUM FRACTIONS BOILING IN THE RANGE C9 AND ABOVE, COMPRISING CONTACTING THE FRACTION, DILUTED WITH PENTANE, WITH A 5 A. MOLECULAR SIEVE IN A FIRST STAGE TO ABSORB STRAIGHT-CHAIN HYDROCARBONS; CONTACTING THE SIEVE IN A SECOND STAGE WITH A STREAM OF PENTANE PASSED THROUGH THE SIEVE IN A DIRECTION OPPOSITE TO THAT IN WHICH THE FEED FRACTION WAS PASSED TO REMOVE MATERIAL ABSORBED ON THE SURFACE OF THE SIEVE AND MATERIAL HELD INTERSTITIALLY BETWEEN SIEVE PARTICLES AND RECYCLING THE REMOVED MATERIALS TO THE FEEDSTOCK TO THE ABSORPTION STAGE; AND CONTACTING THE SIEVE IN A THRID STAGE WITH A STREAM
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |